Charmed

She's a Man, Baby, a Man! (2x5)

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The sisters discover that Phoebe is psychically linked, through her powers, to a man-killing demon known as a 'Succubus.' In order to lure the Succubus to the sisters, Prue casts a spell, which turns her into a man. Meanwhile, Piper discovers from a video tape at the dating service that their new neighbour, Dan, is interested in her.