The Starlost

William Osler

Mu Lambda 165 (aka: Host Computer)

Keir Dullea

Devon

Robin Ward

Garth

Gay Rowan

Rachel

James Barron

Garth's Father

Aileen Seaton

Rachel's Mother

Walter Koenig

Oro

Scott Fisher

#4

Allen Stewart-Coates

Computer voices (voice)

Ed Ames

Mr. Smith

Sterling Hayden

Old Jeremiah

George Sperdakos

Jubal

Gillie Fenwick

Old Abraham

Sean Sullivan

Rachel's Father

Kay Hawtrey

Garth's Mother

Alexandra Bastedo

Idona

Stephen Young

Dr. Chris

Frank Converse

Dr. Gerald W. Aaron

John Colicos

The Governor

Barry Morse

Shaliff

Lloyd Bochner

Col. M.P. Garoway

David Tyrell

One - Captain

Susan Stacey

Five

Simon Oakland

Dr. Asgard