Douglas Quaid

Arnold Schwarzenegger

Melina

Rachel Ticotin

Lori Quaid

Sharon Stone

Vilos Cohaagen

Ronny Cox

Richter

Michael Ironside

George / Kuato

Marshall Bell

Helm

Michael Champion

Benny

Mel Johnson Jr.

Dr. Edgemar

Roy Brocksmith

Bob McClane

Ray Baker

Dr. Lull

Rosemary Dunsmore

Ernie

David Knell

Fat lady

Priscilla Allen

Tiffany

Alexia Robinson

Tony

Dean Norris

Bartender

Mark Carlton

Thumbelina

Debbie Lee Carrington

Mary

Lycia Naff

Harry

Robert Costanzo

Stevens

Michael LaGuardia

Pricilla Allen

Immigration Officer

Ken Strausbaugh

Everett

Marc Alaimo

Rebel Lieutenant

Michael Gregory

Ken Gilden

Hotel Clerk

Ken Gildin

Burly Miner

Mickey Jones

Martian Husband

Parker Whitman

Martian Wife

Ellen Gollas

Johnnycab (voice)

Robert Picardo

Woman in Phone Booth

Gloria Dorson

Miss Lonelyhearts

Erika Carlsson

Punk Cabbie

Benny Corral

Erika Carlson

Doctor

Bob Tzudiker

Lab Assistant

Erik Cord

Technician

Frank Kopyc

Scientist

Chuck Sloan

Newscaster

Paula McClure

Scientist

Dave Nicolson

Reporter

Rebecca Ruth

Commercial Announcer

Milt Tarver

Agent

Roger Cudney

Mutant Mother

Monica Steuer

Mutant Child

Sasha Rionda

Tennis Pro

Linda Howell

Mel Jr. Johnson

Additional Voices (voice)

Anne Lockhart

Additional Voices (voice)

Kamala Lopez

Additional Voices (voice)

Morgan Lofting

Additional Voices (voice)

Patti Attar

Additional Voices (voice)

Bob Bergen

Additional Voices (voice)

Karlyn Michelson

Additional Voices (voice)

Joe Unger

Harry's Henchman (uncredited)

Allan Graf

Harry's Henchman (uncredited)

Joel Kramer

Paul Johansson

Sharon Kane

Man Standing Behind Fat Lady (uncredited)

Steven Lambert

Richter's Henchman (uncredited)

Andy Armstrong

Paul Verhoeven

Richter's Henchman (uncredited)

Terry Richards

Richter's Subway Agent (uncredited)

Bennie Moore

Richter's Subway Agent (uncredited)

Billy D. Lucas

Richter's Subway Agent (uncredited)

Graeme Crowther

Richter's Subway Agent (uncredited)

Peter Kent

Subway Rider (uncredited)

Thomas Ebert

Vestron Soldier (uncredited)

Frank Allen Forbes