Charmed (1998)

S7E20 Imaginary Fiends

The sisters are unaware that Wyatt's so-called "imaginary" friend, Vicus, is a demon intent on gaining Wyatt's trust to lead him down a dark path. At the same time, Piper attempts a spell to understand baby Wyatt better, but instead, she accidentally summons a 25-year-old version of Wyatt from the future.