Cast of Escape to Witch Mountain

Eddie Albert plays Jason O'Day, a kind-hearted man who becomes involved with the siblings and helps them on their quest.

Ray Milland portrays Aristotle Bolt, a wealthy and influential man who has his own interests in the mysterious powers of the siblings.

Donald Pleasence takes on the role of Lucas Deranian, a cunning and relentless man who is determined to capture the siblings for his own gains.

Kim Richards plays Tia Malone, one of the siblings with telepathic and telekinetic abilities, who is on a quest to discover her true identity.

Ike Eisenmann portrays Tony Malone, the sibling brother of Tia, who also possesses extraordinary powers and joins his sister in their journey.

Walter Barnes is Sheriff Purdy, a local law enforcement officer who gets involved in the siblings' extraordinary adventure.

Reta Shaw portrays Mrs. Grindley, a caring woman who offers her help and support to the siblings during their journey.

Denver Pyle plays Uncle Bene, a warm-hearted relative of the siblings who plays a significant role in their mysterious origins.

Alfred Ryder is the Astrologer, a mysterious character who provides guidance to the siblings on their quest.

Lawrence Montaigne portrays Ubermann, an enigmatic figure who crosses paths with the siblings during their journey.

Terry Wilson is Biff Jenkins, a character who becomes entangled in the siblings' adventure as their paths intersect.

George Chandler plays the Grocer, a friendly local resident who assists the siblings on their quest with kindness and understanding.