John P. Ryan as Frank Davis

Sharon Farrell as Lenore Davis

Andrew Duggan as The Professor

Guy Stockwell as Bob Clayton

James Dixon as Lt. Perkins

Michael Ansara as The Captain

Robert Emhardt as The Executive

William Wellman Jr. as Charley

Shamus Locke as The Doctor

Nancy Burnett as Nurse

Daniel Holzman as Chris

Diana Hale as Secretary

Patrick McAllister as Expectant Father

W. Allen York as Expectant Father

Gwil Richards as Expectant Father

Jerry Taft as Expectant Father

Gerald York as Expectant Father