Return from Witch Mountain (1978)

Synopsis
The Fury meets The Misadventures of Merlin Jones in this comic-book sequel to Disney's Escape to Witch Mountain. Reprising their roles as the psychic siblings from another world are Kim Richards as Tia and Ike Eisenmann as Tony. Their Uncle Bene (Denver Pyle) gives the kids a treat by letting them vacation on planet Earth, and they make the most of it by immediately getting into hot water. It seems that arch-fiend Dr. Victor Gannon (Christopher Lee) and his Bette Davis-like accomplice, Letha (Bette Davis), are in the process of testing a mind-control device. They want to see if they can mentally save their cohort Sickle (Anthony James) from plunging to his death from atop a building. Tony spots Sickle's plunge and telekinetically saves him. When Dr. Gannon sees Tony's powers, he kidnaps him, hoping to utilize his otherworldly powers for his own nefarious purposes. Enlisting the aid of a collection of low-life youngsters (Christian Juttner, Brad Savage, Poindexter, and Jeffrey Jacquet), Tia uses her powers of telepathy to contact her brother and tries to rescue him from Gannon's clutches. ~ Paul Brenner, All Movie Guide