During the early years of the Revolutionary War, a Long Island farmer is recruited to spy on the British army.
To prevent Anna being blamed for the murder of a Royal Officer, Abe must find the culprit; Ben and Caleb interrogate Simcoe.
On the run from the British, Ben is betrayed by his own militia. Abe travels with Richard to New York to spy. Mary confronts Anna.
Abe and Richard grapple with orders to dig up gravestones; Ben and Caleb try to get their intelligence to General Washington.
Celeb and Ben follow mysterious orders; Washington's army crosses into enemy territory.
Abe heads to New York and runs into a desperate patriot along the way. Ben is tasked with creating America's first spy ring.
An old threatening presence returns to Setauket, worrying Abe that Anna is no longer protected.
Anna looks for enemy intelligence at an exclusive gentleman's party against Abe's wishes.
Simcoe tries to hunt out the rebel conspirators in Setauket. Ben is sent away on a secret mission.
Mary struggles when she realizes that Abe is a spy working for the other side. Ben and Caleb hope to save Patriot families when they carry out a raid on Setauket.
Benedict Arnold rounds up spies in New York; and Abe plots to destroy essential British supplies, but he will need his father's help.
When one of the Culper Ring members is captured, Arnold seeks to interrogate him with the help of a ruthless Col. Simcoe.
As an unsettling rebellion begins to take hold in camp, the Culper Ring assesses that it must develop a new path; Benedict Arnold makes the discovery of an unlikely new ally; Rivington decides to teach Townsend a memorable lesson.
As he ultimately seeks to gain his revenge against Lt. John Simcoe, Abe journeys to New York and is introduced to Benedict Arnold; Anna's history comes into play, as a visitor from her past arrives in the continental camp.
The plot to abduct Benedict Arnold is initiated, as the New York operation takes a turn; Peggy finally becomes aware of Cicero's hidden secret; George Washington and the French clash over the use of the correct strategy.
Unexpectedly, Ben's intentions to kidnap Benedict Arnold run into a conflict with Abe's plan to eliminate Simcoe; in an unusual twist of fate, former adversaries become new allies, as loyalties experience a shift in perspective.
Abe finds himself perilously thrown into the midst of a fierce battle, as Ben eventually decides to make a direct appeal to General Washington; Townsend is determined to risk everything, while Caleb desperately seeks to find redemption.
Washington heads south to lay siege on Yorktown; Abe volunteers for the Continental Army; Peggy goes into labor.
In the third-season premiere, Abe covers up a murder with an unlikely accomplice. Elsewhere, Benedict Arnold abuses his power as he settles into a new home in Philadelphia.
Anna tries to save the ring after Abe's cover is blown; and Benedict Arnold seeks Washington's help against charges of treason. Meanwhile, Townsend sends a signal.
Peggy gets Benedict Arnold to contact the British; Caleb plans an ambush for Simcoe; Anna tries to save Major Hewlett.
A mysterious woman rescues Ben; Abe tries to stop Anna and Hewlett's marriage; Arnold negotiates with the British and Andrew betrays Peggy
Townsend uncovers a British counterfeiting operation. Rogers threatens to destroy Abe's spying ring. Simcoe threatens Richard.
Washington goes to Benedict Arnold's Philadelphia ball; Abe tries to stop Rogers from reaching Townsend; old friends and enemies collide.
Mary attempts to kill Simcoe by herself; Benedict Arnold defends himself in his court-martial; Ben reunites with his savior.
The Culper Ring is resurrected in time to save Washington's army. Simcoe terrorizes Setauket as he hunts for Rogers. Anna infiltrates New York.
Benedict Arnold plots to turn over West Point to the British. Andre negotiates for Peggy. Abe plots revolt in Setauket.
A spy in London sends an urgent message to America. Mary impedes Abe's attempt to restart the spy ring. Benedict Arnold arrives in camp.
Abe tries to recruit a new agent; Caleb and Rogers race to hunt down intelligence from London; Andre's history is exposed.
Abe makes one last effort to recruit a spy inside New York; Ben must determine who is a double agent.
Mary begs Richard to help get Abe free from prison; Anna tries to seduce Simcoe; Ben and Caleb rescue Hewlett.
Washington faces a personal crisis with the help of his slave, Billy Lee. Abe struggles to maintain his cover while in prison.
Caleb sails into New York Harbor; France makes an alliance with the American Patriots; Andre and Peggy plan to elope.
Abe returns from prison with crucial information; tensions rise between Hewlett and Simcoe; Arnold rescues Peggy.