Arnold Schwarzenegger Douglas Quaid / Hauser

Rachel Ticotin Melina

Sharon Stone Lori Quaid

Ronny Cox Vilos Cohaagen

Michael Ironside Richter

Marshall Bell George / Kuato

Mel Johnson Jr. Benny

Michael Champion Helm

Roy Brocksmith Dr. Edgemar

Ray Baker Bob McClane

Rosemary Dunsmore Dr. Lull

David Knell Ernie

Alexia Robinson Tiffany

Dean Norris Tony

Mark Carlton Bartender

Debbie Lee Carrington Thumbelina

Lycia Naff Mary

Robert Costanzo Harry

Michael LaGuardia Stevens

Priscilla Allen Fat Lady

Ken Strausbaugh Immigration Officer

Marc Alaimo Everett

Michael Gregory Rebel Lieutenant

Ken Gildin Hotel Clerk

Mickey Jones Burly Miner

Parker Whitman Martian Husband

Ellen Gollas Martian Wife

Gloria Dorson Woman in Phone Booth

Erika Carlsson Miss Lonelyhearts

Benny Corral Punk Cabbie

Bob Tzudiker Doctor

Erik Cord Lab Assistant

Frank Kopyc Technician

Chuck Sloan Scientist

Dave Nicolson Scientist

Paula McClure Newscaster

Rebecca Ruth Reporter

Milt Tarver Commercial Announcer

Roger Cudney Agent

Monica Steuer Mutant Mother

Sasha Rionda Mutant Child

Linda Howell Tennis Pro

Robert Picardo Johnnycab (voice)

Kamala Lopez Additional Voices (voice)

Morgan Lofting Additional Voices (voice)

Patti Attar Additional Voices (voice)

Bob Bergen Additional Voices (voice)

Joe Unger Additional Voices (voice)

Karlyn Michelson Additional Voices (voice)

Joel Kramer Harry's Henchman (uncredited)

Andy Armstrong Richter's Henchman (uncredited)

Graeme Crowther Richter's Subway Agent (uncredited)

Thomas Ebert Subway Rider (uncredited)

Frank Allen Forbes Vestron Soldier (uncredited)

Allan Graf Harry's Henchman (uncredited)

Peter Kent Richter's Subway Agent (uncredited)

Steven Lambert Man Standing Behind Fat Lady (uncredited)

Billy D. Lucas Richter's Subway Agent (uncredited)

Bennie Moore Richter's Subway Agent (uncredited)

Terry Richards Henchman at Cementfactory (uncredited)