Produced by George Pal and directed by Byron Haskin, it was substantially changed in the John Gay screenplay, moving the location to San Marino, California, changing most of the characters' names (although retaining the surnames of Tanner, Nordlund, and department head Professor Van Zandt), and eliminating several subplots and characters, presumably to fit the story into a 108-minute film. George Hamilton starred as Professor Jim Tanner, Suzanne Pleshette as his teammate and romantic interest Margery Lansing (Marge Hanson in the novel), and Michael Rennie (famous among science fiction movie fans as Klaatu in The Day the Earth Stood Still) as new government liaison Mr. Nordlund. Otherwise, the story proceeds in a fashion similar to the novel, except for a somewhat different twist to the conclusion.
This somewhat obscure movie is memorable for a number of intriguing scenes, including murder by centrifuge, a seemingly possessed "Walk / Don't Walk" sign, toy soldiers firing with real gunpowder, and winking inanimate objects (the last two also in the novel). The soundtrack also memorably features a beating heart to signal the mind-control attempts and eerie music from a cymbalum (a hammered dulcimer-like instrument) accompanying the more suspenseful moments. The music, written by Oscar-winning composer Miklós Rózsa, actually contributes an amusing fourth wall-breaking moment when Tanner, hearing the haunting tune, seems to expect a new disaster, only to be visibly relieved when he finds a cymbalum-violin duet being performed in the hotel lobby.
The Power (1968)
Cast: Aldo Ray, Earl Holliman, George Hamilton, Ken Murray, Michael Rennie, Nehemiah Persoff, Suzanne Pleshette, Yvonne De Carlo