Arnold Stang

Pretzie

Arnold Schwarzenegger

Hercules

Deborah Loomis

Helen Camden

James Karen

Professor Camden

Ernest Graves

Zeus

Tanny McDonald

Juno

Harold Burstein

Rod Nelson

Merwin Goldsmith

Maxie

George Bartenieff

Nitro

Taina Elg

Nemesis

Michael Lipton

Pluto

Jan Adams

William Bass

Rudy Bond

Ship Captain

Lane Carroll

Tony Carroll

Monstro

Oliver Clark

Erica Fitz

Venus

Erin Fleming

Frank Gio

Diane Goble

Diana

Dan Hamilton

Mercury

Richard Herd

Television Presenter

Audrie Magee

Michael Miller

Ronnie Richards

Tony Roland

Alex Stevens

Viola Swayne

Mark Tendler

Samson

Dennis Tinerino

Atlas

Alicia Vetcher

Iris Whitney

Parnell Hall

Man with Chariot (uncredited)

Abe Holiday

Scared Man on Harbor (uncredited)

Sam Stewart

Bear (uncredited)