• 
  Marshall Brickman

  regizor

• 
  Marshall Brickman

  scenarist

• 
  John Lithgow

  Dr. John Mathewson
• 
  Richard Council
• 
  Cynthia Nixon

  Jenny Anderman
• 
  Richard Jenkins
• 
  Fred Melamed

  Assay Technician
• 
  Ned Schmidtke

  Jenny's Parent

• 
  JD Cullum

  Eccles
• 
  Bran Ferren

  Lab Assistant
• 
  Deborah Gibson

  extra
• 
  John Mahoney

  Lt. Col. Conroy
• 
  Gregg Edelman

  Science Teacher
• 
  Harlan Cary Poe

  Local FBI
• 
  Robert Sean Leonard

  Max

• 
  Robert Schenkkan

  Government Aide
• 
  Peter McRobbie

  Electronics
• 
  John Doumanian

  Cabbie
• 
  Joan Harris

  Barbara Collins/TV Reporter
• 
  Jimmie Ray Weeks

  SWAT
• 
  Geoffrey Nauffts

  Craig
• 
  Jill Eikenberry

  Elizabeth Stephens
• 
  Steve Blum

  Laser Efficiency Kid
• 
  Al Cerullo

  Helicopter Pilot
• 
  Charles Fields

  Price
• 
  Dan Butler

  SWAT
• 
  David Quinn

  Tennis
• 
  Paul Austin

  General
• 
  Christopher Collet

  Paul Stephens
• 
  Curt Dempster

  Scientist
• 
  Adrian Sparks

  Scientist
• 
  Abraham Unger

  Roland (as Abe Unger)