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

Cast: Janet Montgomery, Shane West, Seth Gabel, Tamzin Merchant, Ashley Madekwe, Elise Eberle, Iddo Goldberg, Joe Doyle, Oliver Bell, Emma Claire Wynn, Danny Cosmo, Jonny Coyne, Jeremy Crutchley, Rebecca Gamble, Perry Hinson