Revenge of the Doppelganger (S01E19)

S01E01 Salesmen Are Like Vampires S01E01 It Came from the Bog S01E02 Sexy Rollercoaster S01E02 Terror from the Sky S01E03 Close Encounters S01E03 Shriek from Beyond S01E04 The Widow Maker S01E04 The Creeping Slime S01E05 Smell the Weakness S01E05 Curse of the Deep S01E06 The Secret of Sales S01E06 Nightmare of the Coven S01E07 Mark of the Shapeshifter S01E08 Mystery of the Vanishing S01E09 It Came from Inside the Box S01E10 Attack of the Sandman S01E11 Eternal Christmas S01E12 Return of the Dark Druid S01E13 They Lurk Beneath S01E14 Haunting of the Blackwater S01E15 Mystery of the Hole Creature S01E16 Fright from the Ice S01E17 Beast from Within S01E18 Curse of the Necklace S01E19 Revenge of the Doppelganger S01E20 The Return of the Beasts S01E21 Attack of the Mothman S01E22 Summer Camp Nightmare S01E23 The Sewer Thing S01E24 Scream from the Forest S01E25 The Amazon Vapor S01E26 The Awakening