The Black Hole

Maximilian Schell

Dr. Hans Reinhardt

Anthony Perkins

Dr. Alex Durant

Robert Forster

Captain Dan Holland

Joseph Bottoms

Lieutenant Charles Pizer

Yvette Mimieux

Dr. Kate McCrae

Ernest Borgnine

Harry Booth

Tom McLoughlin

Captain S.T.A.R.

Roddy McDowall

V.I.N.CENT. (voice) (uncredited)