When Mary and Alden join forces, Alden gets his first test in fatherhood.

Mary makes a sacrifice to save her son from Marburg.

Mary makes a last ditch effort to stop Countess Marburg's attempts while alliances shift as surprising truths are revealed.

Mary refuses to believe that her son is still alive while the Countess does everything she can to impress the boy. Ann tries to convince Cotton that she uses her powers for good and Alden balances between life and death.

Salem's leading witch, Mary Sibley, faces both foreign and domestic challenges to her authority.

Mary initiates the second act of the Grand Rite. Alden returns to Salem.

Countess Marburg arrives in Salem and threatens Mary's stronghold on the city.

Countess Marburg's achilles heel is revealed.

Mary has a public fall from grace. Alden and Cotton try to save the boy's soul.

Mary and her tormentor, Countess Marburg, meet face-to-face.

Mary and Countess Marburg keep up appearances while continuing their covert battle for Salem.

Mary receives help from a former foe to keep Salem in the grasp of the witches.

Anne explores her supernatural side. Mary receives a chilling warning.

Alden comes to learn Mary's biggest secret.

Salem's only hope to survive the hell that has risen is to raise the dead.

Series Finale. Everyone prepares on the eve of Salem's demise.

With witch fears rising, Alden seeks the truth of what’s really going on in Salem while Cotton continues to wrestle with his guilt and Mary looks to execute a plan. The witches get closer to finding out who interrupted the ceremony, but Mary continues to find her emotions for Alden affecting her focus. A clue in the woods leads Cotton and Isaac to find more evidence that the witches may indeed be real.

An old nemesis of Alden's arrives in Salem with secrets that could destroy him. Meanwhile, Mary loses her grip on Mercy.

Alden and Cotton find themselves face-to-face with a real witch, and an unlikely ally keeps the coven from tracking down their missing sister. Tituba feels left out when Mary decides to initiate a new member into the coven. As Mary takes her new acolyte under her wing, she recalls her own path after the fateful events surrounding Alden’s departure from town seven years ago. Meanwhile, Alden and Cotton learn to their horror that the trials have actually been helping the witches – and soon find themselves under attack after they lose control of their captive.

Salem sees a second death since Increase's arrival in town, and Mary struggles to get George back under her control. Mercy and her acolytes flex their growing power while Increase grows closer with Isaac, putting Isaac’s loyalty to Mary in question.

Mary’s penance for her betrayal takes a deadly turn while Cotton is forced to perform an exorcism of his own.

After ten years of service fighting in the French and Indian War, John Alden returns to his home in Salem, Massachusetts, intent on reuniting with his love, Mary. Upon his arrival, he is stunned to discover that the town has been swept up in a wave of witch hunt hysteria, and that Mary has married the town’s richest and most powerful resident.

The witches of Salem’s coven meet in the woods – without Mary and Tituba – and agree that they have no choice but to eliminate one of their most dangerous threats: Alden. Meanwhile, Alden and Cotton realize the true, dangerous nature of the mysterious object they uncovered – and use it to ensnare something of much graver importance. Mary realizes that her own coven has been plotting without her… and the relationship between Mary and Mercy is no longer what it seems.

Romantic yearnings between Mary and Alden heighten as Cotton deals with a unique accusation in the trials. Meanwhile, a powerful witch hunter makes his way towards Salem.

Salem trembles in the aftermath of the trial, and Anne turns to John Alden for comfort. Mysterious circumstances lead Alden to suspect Magistrate Hale is not who or what he appears to be. Mary discovers who witnessed the witches’ ceremony and deliberates a course of action. Elsewhere, George Sibley begins hatching a plan to escape Mary’s clutches.