Charmed

Imaginary Fiends (7x20)

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Unbeknownst to the sisters, baby Wyatt's new "imaginary" friend is actually a demon named Vicus who is trying to win Wyatt's trust to turn him evil. Meanwhile, Piper casts a spell to be able to understand baby Wyatt, but inadvertently brings 25-year-old Wyatt back from the future.