
Embedded within the Continental Army, Benedict Arnold is seduced to become an informant for the British. As the consequences of their espionage ripple through the battlefield, the spy game becomes a heart-stopping race to see which mole will be unmasked first.

Episode 1
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.

Episode 2
Anna tries to save the ring after Abe's cover is blown. Benedict Arnold seeks Washington's help against charges of treason. Townsend sends a signal.

Episode 3
Peggy gets Benedict Arnold to contact the British. Caleb plans an ambush for Simcoe. Anna tries to save Major Hewlett.

Episode 4
Ben is rescued by a mysterious woman. Abe tries to stop Anna from marrying Hewlett. Arnold begins negotiations with the British. Andre betrays Peggy.

Episode 5
Townsend uncovers a British counterfeiting operation. Rogers threatens to destroy Abe's spying ring. Simcoe threatens Richard.

Episode 6
Washington goes to Benedict Arnold's Philadelphia ball. Abe tries to stop Rogers from reaching Townsend. Old friends and enemies collide.

Episode 7
Mary attempts to kill Simcoe by herself. Benedict Arnold defends himself in his court-martial. Ben reunites with his savior.

Episode 8
The Culper Ring is resurrected in time to save Washington's army. Simcoe terrorizes Setauket as he hunts for Rogers. Anna infiltrates New York.

Episode 9
Benedict Arnold plots to give West Point to the British. Andre negotiates for Peggy. Abe plots a revolt in Setauket.

Episode 10
The captured spies on both sides of the war head to the gallows. Benedict Arnold demands glory revenge.