朱莉·克里斯蒂

Julie Christie

饰：Dr. Susan Harris

弗里茨·韦弗

Fritz Weaver

饰：Alex Harris

格里特·格雷厄姆

Gerrit Graham

饰：Walter Gabler

贝里·克勒格尔

Berry Kroeger

饰：Petrosian

卢燕

Lisa Lu

饰：Soon Yen

拉里·J·布莱克

Larry J. Blake

饰：Cameron

Alfred Dennis

Alfred Dennis

饰：Mokri

Davis Roberts

饰：Warner

Patricia Wilson

Patricia Wilson

饰：Mrs. Trabert

Dana Laurita

饰：Amy

Michelle Stacy

饰：Marlene,Child of Proteus

费利克斯·西拉

Felix Silla

饰：Baby

迈克尔·多恩

Michael Dorn

饰：Bit (uncredited)

罗伯特·沃恩

Robert Vaughn

饰：Proteus IV (uncredited)

E. Hampton Beagle

饰：Night Operator

Michael Glass

饰：Technician #1

Barbara O. Jones

饰：Technician #2

Monica MacLean

饰：Joan Kemp

Peter Elbling

饰：Scientist (as Harold Oblong)

Georgie Paul

饰：Housekeeper

Tiffany Potter

饰：Baby

Barbarao

饰：Technician

约翰·奥莱利

John O'Leary

饰：Royce