Norman Kelley as Dr. Roy Anderson

Tanna Hunter as Jenny Anderson

Bruce Detrick as Don Tucker

Paul Craig Jennings as Creton

Jack Neubeck as Egon

Richard Erickson as Sontag

Cynthia Fleming as Queen Onhorrid

Lucy Grant as Mrs. Greenman

Frank Iovieno as Police Chief Frank Spano

Warren D'Oyly-Rhind as Omar

Ed Adlum as Victim in Shower / Narrator (uncredited)