John Mathewson
John Lithgow
Paul Stephens
Christopher Collet
Jenny Anderman
Cynthia Nixon
Elizabeth Stephens
Jill Eikenberry
Lt. Col. Conroy
John Mahoney
Night Guard
Sully Boyar
Radiation Controls Officer
Richard Jenkins
Government
Richard Council
Max
Robert Sean Leonard
Government Aide
Robert Schenkkan
General
Paul Austin
Laser Efficiency Kid (as Richard Cardona)
Steve Blum
Scientist
Adrian Sparks
Jenny's Parent
Sarah Burke
Scientist
Curt Dempster
Lab Assistant
Bran Ferren
Lab Assistant
Brian Ferren
Science Teacher
Greg Edelman
Science Teacher
Gregg Edelman
Assay Technician
Fred Melamed
Roland
Abe Unger
Max
Robert E. Leonard
Tennis
David Quinn
Craig
Geoffrey Nauffts
Emma
Katherine Hiler
Terry
Trey Cummins
Local FBI
Steve Borton
Local FBI
Harlan Cary Poe
Jenny's Brother
Allen DeCheser
Jenny's Parent
Ned Schmidtke
Conroy's Lieutenant
Fred G. Smith
Eccles
John David Cullum
Moore
Manny Jacobs
Price
Charlie Fields
Saito
Eric Hsiao
Flirting Kid
Heather Dominic
Halley's Comet Kid
Trevor Bolling
Flirting Kid
Bruce Smolanoff
Registrar
Joan Kendall
Cabbie
John Doumanian
Injection Doctor
Tom Tarpey
FBI
Alec Massey
FBI
Edward D. Murphy
FBI
Dee Ann McDavid
TV Reporter
Joan Harris
Himself
Kerry Donovan
Command
Ken Chapin
Electronics
Peter McRobbie
Computer
Warren Keith
Interrogator
Bruce Jarchow
Interrogator
Stephen Markle
Helicopter Pilot
Al Cerullo
Relief Guard
Timothy Carhart
Day Attendant
Warren Manzi
Day Security Receptionist
Michael Telesco
SWATS
Frank Ferrara Sr.
SWATS
Jimmy Ray Weeks
SWATS
William Weslow
SWATS
Dan E. Butler
SWATS
Steve Zettler
SWATS
Richard Caselnova
Flirting Kid
Heather Rose Dominic