Christopher Walken as Michael Brace

Natalie Wood as Karen Brace

Louise Fletcher as Lillian Reynolds

Cliff Robertson as Alex Terson

Jordan Christopher as Gordy Forbes

Donald Hotton as Landan Marks

Alan Fudge as Robert Jenkins

Joe Dorsey as Hal Abramson

Bill Morey as James Zimbach

Jason Lively as Chris Brace

Darrell Larson as Security Technician

Lou Walker as Chef

Stacey Kuhne-Adams as Andrea

John Hugh as Animal Lab Technician

Ira David Wood III as Barry (as David Wood)

Keith Colbert as Dr. Ted Harris

Jerry Bennett as Dr. Janet Bock

Mary Fran Lyman as Realtor (as Mary-Fran Lyman)

Jack Harmon as Security Guard

Nina Axelrod as Simulator Technician

Lana Clarkson as Food Fantasy Girl (uncredited)

George Sasaki as Scientist (uncredited)