The first Technicolor horror film since Mystery of the Wax Museum, Dr. Cyclops was directed by Ernest Schoedsack, of King Kong fame. Albert Dekker chews the scenery as mad scientist Dr. Thorkel, who has developed a process that will shrink human beings to doll size. His first victims include mining engineers Bill Stockton (Thomas Coley) and Steve Baker (Victor Kilian) and biologists Mary Mitchell (Janice Logan) and Dr. Bullfinch (Charles Halton). At first willing to play-act the role of benevolent despot with his miniaturized captives, Thorkel reveals the more sinister side of his personality by abruptly murdering Bullfinch in cold blood (easily the film's most frightening sequence). The rest of the picture details the escape efforts of the three pint-sized protagonists as they hack their way through a jungle of gigantic foliage and do battle with oversized wildlife. Though the cheery Technicolor hues tend to dilute the "scare" quotient in Dr. Cyclops, the special effects are superbly convincing throughout.
by Hal Erickson synopsis