Lost Girl focuses on the gorgeous and charismatic Bo, a supernatural being called a succubus who feeds on the energy of humans, sometimes with fatal results. Refusing to embrace her supernatural clan and its rigid hierarchy, Bo is a renegade who takes up the fight for the underdog while searching for the truth about her own mysterious origins.
The gang takes on a case of stolen memory, only to discover they're all forgetting something… or someone. The new Morrígan is hell-bent on making sure some memories stay buried forever.
Dyson seeks out an elemental Fae to rescue someone he loves. Kenzi’s stuck on babysitting duty – but her unlikely charge might be the key to cracking the case.
Dyson rushes to be by Bo's side when she puts her life on the line to save a haunted family. At the same time, Lauren finds, much to her dismay, that she can no longer outrun her past.
When the Clubhouse is robbed, Kenzi's forced to make a confession that could threaten her friendship with Bo. An angry and frustrated Bo confronts a dangerous foe and makes a shocking discovery.
Bo's pursuit for answers steers the group to a Dark Fae party, with a dangerous guest list. Trick is summoned to appear before the Una Mens.
Bo fights for the freedom of a talented opera singer, whose voice could be the key to unlocking the answers she seeks. Kenzi is threatened by someone from Hale's past.
Bo and Lauren team up to venture into Dyson’s memory when he's on trial for a murder.
Bo’s friends are having too much fun celebrating the Yule to realize that she's gone missing. But when the night starts repeating itself, Bo makes it her mission to stop it. Meanwhile, Lauren and Dyson disagree over a mysterious package addressed to Bo.
Bo resolves to go to hell and back to get the answers she’s been searching for, with or without her friends' support. Meanwhile, Kenzi's determined to uncover what Trick's hiding.
With the gang still reeling from Bo's shocking announcement, Kenzi signs them up for an undercover mission at a mysterious corporation. Meanwhile, Bo retraces the steps that may lead to her destiny.
After Bo narrowly escapes an attack by a vengeful Fae, the team tracks down who sent it, only to make Bo doubt her feelings for someone she loves. Meanwhile, Kenzi's surprised by a visit.
Bo is reluctant to comply with her role in a prophecy foretold by an order of Knights, until advice from a surprising source helps her make a difficult decision.
Bo is forced to make the toughest decision of her life to stop evil from bringing destruction on her world.
Bo goes to hell and back to rescue a friend while Tamsin faces a foe from her past.
Bo needs the help of an estranged family member. Lauren finds herself haunted by a mysterious spirit.
Bo and Tamsin protect a Japanese warrior with a hit on his head. Lauren deals with death threats of her own.
Bo and Tamsin disagree over a young Fae who asks for help. Trick turns to Dyson with a mysterious case and an unwanted partner.
When an oracle goes missing, Bo poses undercover on a Fae dating website to lure the suspect.
Bo and Tamsin infiltrate the world of college football to investigate a homicide that might expose the Fae. Dyson investigates a murder victim who won’t stay dead.
Bo and the gang deal with the aftermath of a storm.
Bo and the gang attend a party with a mission to take down a new enemy.
Bo and her allies race to stop an ancient evil from wreaking mass destruction.
Bo risks life and limb to retrieve an elusive Fae painting for a friend. Meanwhile, Lauren makes a stunning revelation.
A dangerous mission forces Tamsin to confront past mistakes. Meanwhile, Lauren must deliver bad news to a friend.
Bo tracks down an old foe who has taken on a new form.
When conflicting versions of her past emerge, Bo searches for the truth.(
While under lockdown, the gang rallies to save one of their own.
Bo risks her freedom to do a favor for Lauren, only to discover she’ll have to do it “au naturel.” The new Ash is revealed and Bo’s new appetites shock…has she not recovered from last season’s battle after all?
When Kenzi’s childhood friend is snatched away before her eyes, Bo follows her underground to help find him. Meanwhile, Dyson’s new partner looks like trouble for Bo.
Bo’s houseguest Vex unwittingly brings “greetings” from a vengeful Morrigan - sparking a chaotic role-reversal that demands humans as Kenzi and Lauren work together to save their Fae friends.
Bo and Dyson take on a case in the world of new age psychology, and Bo suffers the consequences of denying her ravenous hunger.
When humans start dissolving into goo, Bo uncovers a nefarious twist to a sexy Key Club. Meanwhile, Bo becomes concerned over Kenzi’s attachment to her forcing Bo to make an extreme revelation about her friend.
The gang is forced to stage an intervention against an increasingly erratic Bo. Forcing Bo to learn the truth about secrets kept by the people she trusted most.
Bo faces the daunting task of returning to where it all started: down home on the farm. There Bo faces her old demons - and a new one -to clear the way for the path she will soon be forced to travel.
What was meant as a much-needed night off for Bo grows into a scavenger hunt in a lawless Dark Fae territory. In Bo’s absence, Trick is placed in a precarious position with potentially dire consequences.
Reality and fantasy converge as Bo confronts her ultimate challenge. Trick dreads the meaning of something he sees.
Bo, Dyson and Kenzi go undercover at an urban camp to catch a serial killer Fae who preys on at risk youth. A blast from the past greets Tamsin, but the visit may not be purely social. Bo is given some emotional news that is hard for her to accept.
Bo and Kenzi become entangled in the schemes of a gated community when a babysitter pleads for their help to prove her employer has met with a foul end. Meanwhile, Lauren comes to a difficult – and dangerous – decision.
Chaos strikes during a daring attack on The Dal, leaving the fate of one of the gang in the balance. Meanwhile, The Morrigan leaps on the opportunity to ignite the tensions between Light and Dark… catching Kenzi and Hale in the crossfire.
Bo attempts an unlikely rescue against an army to save two people who are dear to her – unaware of the dangers facing those she leaves behind. Kenzi has an epiphany about Hale. Dyson is given an important clue to Bo’s past, just as doubt is cast on his own future.
Bo has been living on the run from her strange appetites and what havoc they wreak. After leaving someone she kills out in the open, she is contacted by a group called The Fae. She discovers who and what she is, and is told to join one of two tribes.
Fresh from the realization that she is a member of the Fae, Bo is approached by a strange client, Will, a real life Will O' the Wisp. The storehouse of jewels he's collected over the centuries has been stolen... by a human! While this line of work is foreign to Bo, Will offers her an irresistible payment - information about where she might have come from. As Bo gets involved in the recovery of Will's gems, she finds the shocking truth about the thief... and the weird and deadly forces that seem to also be on the trail of the jewels.
Bo and Kenzi open a private investigation office. Their first job is to find a missing student at a local college. Kenzi goes undercover in the college, Bo joins campus security to uncover what happened. Bo and Dyson's relationship goes on the rocks and another species of Fae is revealed.
When a Fury with an unfaithful spouse tries to hire Bo to kill her husband's mistress, Bo instead takes the side of the unsuspecting human woman and puts her under protection.
Bo is hired by a Dark Fae named Mayer to find out how a human managed to win a bet with him. The reward for finding out is having an Oracle reveal something of Bo's past to her. Bo solves the mystery by finding out that a Fae that can jump between human corpses, called a Hsien, managed the deed. In the end, the answers Bo seeks are not given, but she does learn one thing. Her mother is alive, and coming for Bo.
While tagging after Lauren and Bo in the Fae world, Kenzi becomes deathly ill (and incredibly grossed-out) when she inadvertently eats some toxic human soup at the home of an Aswang.
A murder-suicide leads a human household to hiring Kenzi as a Shaman. Accidentally cleansing their house, a psychosis-inducing venomous Fae spider tags along when she returns home.
Bo's freelance work earns her a lead on someone who might know something about her mother... but the trail ends at Lou Ann, a death row inmate who claims not to know anything at all. Desperate to prove otherwise, and increasingly convinced Lou Ann is innocent, Bo uses all her Fae connections to try and bust her out of jail. When she has to admit defeat, Bo's goal switches to one of personal vengeance: to find Vex, the Fae that framed Lou Ann, and make him pay.
A fun-filled Fae "high holiday" turns potentially deadly when a Banshee wail predicts the death of someone in Trick's bar to occur within the next 12 hours. After a scramble that puts Bo and Dyson on the Banshee's trail, the two learn the name of the Light Fae (Sean) who's marked for death – and his last wish is for them to help him reconcile with his Dark Fae brother. Bo has to heal the rift between the two brothers at great risk to herself, while trying to unravel and prevent the mysterious death omen hanging over Sean.
While investigating a baffling sex-related murder case, Bo comes into contact with Saskia, a carefree Succubus who has much to teach her. But as they work together to find the serial killer Saskia reveals her true Dark Fae colours, which tests the limits of this newfound friendship -- and of Bo's own inner bad girl. Now feeling like a third wheel, Kenzi joins forces with Trick in a race against time to help him keep an old promise and save The Dal Riata.
When Dyson wakes up bloody and without the last eight hours of memory, he finds himself accused of murdering Ba'al, a close associate of The Morrigan's pet psychopath, Vex, and takes refuge in Trick's bar, invoking sanctuary.
Bo and Dyson go undercover as a married power couple at a swank country club to help an old friend from Kenzi's criminal past. At first they enjoy their taste of the good life – and the chance to play house. But soon the emotional pressure of the charade, and the increasing body count, push Dyson and Bo to a new level in their relationship... and prompts Dyson to give Trick an ultimatum. It’s time for them to tell Bo all they know about her origins once and for all. But before Dyson has a chance to come clean to Bo, an unexpected arrival drops by and tries to silence him for good.
Bo finally learns the identity of her mother – and that those closest to her have been keeping secrets. No longer sure who to trust, Bo decides to track down “Mommy Dearest” alone, in order to extract the truth about her own origins once and for all. While everyone frantically searches for Bo, Dyson visits an ancient Norn, a wish-granting, tree-dwelling crone, where – in order to protect the woman he loves -- he makes a sacrifice that may change his relationship with Bo forever, as she prepares for a final face off with her deadly mother.
A nomadic Fae sideshow comes to town looking to take advantage of the chaos that the bombing of the Light Fae headquarters has wrought. Unbeknownst to the general Light Fae populace, The Ash is in a coma, and his bond with the land is weakening, which makes this the perfect time for the travelling circus freaks to steal the most precious thing the Light Fae possess.
The hunt for the new Ash is on. Literally. A traditional Stag Hunt is held, whereby the candidate who successfully tracks and kills the Stag becomes the next Ash. Bo barely takes a passing interest in this ceremony until a surprise visitor with a vested interest in the hunt appears in her front room.
As Bo struggles to accept the new terms of her and Dyson's relationship, she investigates an apartment building full of residents who appear to have lost their minds.Kenzi's choice to employ a Brownie to help around the house threatens to backfire on her.
In a move of sisterly solidarity, Kenzi drunkenly invokes the Russian hag Baba Yaga to curse Dyson for his behavior towards Bo. In the sober light of day, however, Kenzi and Bo seek to remove the curse.
Bo and Dyson team up to track down a stolen Mongolian Death Worm on behalf of Dyson's old wolf pack mate. When things get complicated, Dyson finds himself reliving his medieval days – tormented by the hard choices he once had to make, and fighting in the present not to repeat past mistakes.
The Morrigan enlists Bo's help to find a tortured graffiti artist under her employ. The young painter has killed a Dark Fae, and his urban murals are exposing Fae secrets all over town – with The Morrigan on the hook for his actions. In exchange for her help with the case, The Morrigan offers Bo information on breaking The Ash's hold on the Lauren.
Bo is happy for the distraction provided by an assembly of strippers that helps break an accused cop-killer out of the police station. While Bo goes undercover at a strip joint to follow the trail of one of the apparent accomplices, Dyson and Hale simultaneously track the murderer. Both investigations meet in the middle at The Hand of Glory – a disembodied hand with remarkable powers. Coming off The Morrigan's shocking revelation about Lauren, Bo and the doctor have a difficult conversation.
Trick’s dear friend seeks his assistance when his ballet dancer husband goes missing – or rather, his ballet dancer husband’s corpse. Bo and Dyson track the dead ballet dancer to a bizarre figure, enlisting Lauren for her scientific expertise along the way.
A night out at the Dal goes awry when an insane trickster spikes the beer with a substance that transfers Bo out of her body – resulting in a ripple effect that finds our regulars inhabiting the skin of their friends, lovers and rivals. Suppressed – and not so suppressed – feelings bubble to the surface, and the brief stays in one another’s bodies gives each surprising insights into the other.
Bo joins the brutal world of underground fighting to help a human competitor juiced up on Fae "steroids" that are sending him on blackout rages – and putting his son in harm's way. Meanwhile, the sister of the first boy she ever killed shows up and confronts Bo over her deadly past.
When rich young humans start turning up dead, Bo agrees to go undercover to help Dyson find the Fae responsible. As she makes her way through the "Gossip Girl" world, Bo learns a deadly kind of class warfare is afoot.
Bo enlists Dyson’s help to find an artifact she believes will release Nadia from her coma -- even though it might mean having to say goodbye to Lauren.
When Trick takes matters into his own hands to foresee the future, he runs the risk of revealing too much to the wrong Fae. Meanwhile, a furious Bo confronts The Ash about a betrayal… and is stunned by his response.
While Bo continues to ponder The Ash’s shocking proposal, she agrees to his interim request – to kidnap a Genie. The assignment becomes complicated and dangerous, and Bo finds herself involved with the most unlikely partner.
What Bo uncovers while investigating the mysterious disappearance of human backpackers threatens her own fine physique. Meanwhile, the new man in Bo’s life sets events in motion that force Kenzi to make a desperate choice.
Bo goes undercover as a high school teacher to investigate a mysterious case-Kenzi soon regrets agreeing to help her. Lauren makes a much anticipated return home from vacation.
Things heat up when Bo tangles with Fae politics in an attempt to save some very important people. Meanwhile, Kenzi risks more than she intended when she does a favour for Hale.
Kenzi and Trick must race to save Bo from the fallout of a steamy night gone awry before it binds the Succubus for a millennium. In its wake, Bo poses very uncomfortable questions to Trick about her origins.
Bo confronts a very powerful Fae, uncertain whether she can trust The Ash’s counsel. The coming War takes its first casualties – literally and figuratively – which challenges Bo’s and Kenzi’s commitments to the cause and the ones they love.
The Ash takes drastic action against the threat bearing down on him, which in turn convinces Bo to make a potentially life-threatening decision. When those close to her suffer devastating injuries, Bo can no longer ignore her destiny.
In the wake of emotional losses, Trick reveals his deepest secret to Bo. Bo realizes there is no turning back and she must go to any extreme, which includes aligning herself with a sworn enemy, to take on a battle that could decide the fate of the Fae.
Concerned that Bo’s plan is too risky, Trick offers Bo one more weapon for her own, and everyone else’s, safety. Bo must lead her friends into battle ahead of schedule when her hand is forced by their enemy. A revelation from Dyson provides Bo with ammunition, but another’s deceit threatens the mission. Prophecies come true… but at what cost?