Tony and Tia are other-worldly twins endowed with telekinesis. When their Uncle Bene drops them off in Los Angeles for an earthbound vacation, a display of their supernatural skill catches the eye of the nefarious Dr. Gannon and his partner in crime, Letha, who see rich possibilities in harnessing the children's gifts. They kidnap Tony, and Tia gives chase only to find Gannon is using her brother's powers against her.
Return from Witch Mountain is a 1978 American science fiction–adventure film and a sequel to Escape to Witch Mountain (1975) and the second film in the Witch Mountain franchise. It was produced by Walt Disney Productions. It was written by Malcolm Marmorstein and is based on characters created by Alexander Key, who also wrote the novelization of the film for Disney. Ike Eisenmann, Kim Richards, and Denver Pyle reprise their roles as Tony, Tia, and Uncle Bené—humanoid extraterrestrials with special powers including telepathy and telekinesis. The two main villains are played by Bette Davis as Letha Wedge, a greedy woman using the last of her money to finance the scientific experiments of Dr. Victor Gannon, played by Christopher Lee. It was the final film of actor Jack Soo, who died of cancer in January 1979.