- Michael Greene
- Dr. Gerald Appleby
- Gregory Sierra
- Nemo
- Otis Young
- Sawyer
- Susan Hunt
- Penny
- Stanley Adams
- Carl Swafford
- Alex Nicol
- Secretary of HEW
- John Drew Barrymore
- Brooks Brothers Hippie
- Barbara Bergdorf
- Janet
- Raynold Gideon
- Fred Kalif
- Walter Robles
- Sheriff
- Noble 'Kid' Chissell
- Laboratory Guard
- Angelo Rossitto
- Man at Phone Booth
- Lamar Card
- Dr. Bradigan
- Sandy Horowitz
- Pilot
- Dave Atkins
- Truck Driver
- Jim Gibson
- Radio Operator
- Roger Nelson
- Cadillac Owner
- Paul Hunt
- Physician
- Joan Brenner
- Airport Receptionist
- Bruce Bennett
- Clone Lab Assistant
- Earle Sampson
- Hospital Orderly
- Terry Woolman
- Fairground Guard
- Tom Brown
- Coach Driver
- Michael Ferris
- Coach Passenger
- Coreen Tippin
- Coach Passenger
- Darrell Cotton
- Coach Passenger
- R. Michael Stringer
- Coach Passenger
- Sean Graver
- Child Patient
- Stephanie Hunt
- Child at Airport
- Bernard Cole
- Russian Scientist
- Elwyn Loh
- Chinese Scientist
- Tom Greenlee
- British Scientist
- Keith Despain
- American Scientist
- Gerry Netkin
- Robot
- Ron Emmons
- Clone Special Effect Double
- Kenneth Bullet
- Radio Voice
