cast
- John Lithgow
- George Henderson
- Melinda Dillon
- Nancy Henderson
- Margaret Langrick
- Sarah Henderson
- Joshua Rudoy
- Ernie Henderson
- Kevin Peter Hall
- Harry
- David Suchet
- Jacques LaFleur
- Lainie Kazan
- Irene Moffitt
- Don Ameche
- Dr. Wallace Wrightwood
- Bill Ontiverous
- Sgt. Mancini
- Chuck McCollum
- Guard
- Connie Craig
- Press Woman #2
- Dave MacIntyre
- Billers
- David Richards
- Dirty Harry Officer
- Debbie Lee Carrington
- Little Bigfoot
- Fred Newman
- Vocal Effects
- James King
- Bicycle Man
- John Bloom
- Feet
- Juleen Murray
- Press Woman #1
- Laura Kenny
- "Mouse" Woman
- Laurie O'brien
- Screaming Woman
- M. Emmet Walsh
- George Henderson Sr.
- Mark Mitchell
- Press Man #1
- Michael Goodell
- Pool Man
- Mickey Gilbert
- Police Officer
- Nick Flynn
- Stuart
- Sean Morgan
- Jerry Seville
- Tom Hammond
- Police Officer
- Vern Taylor
- Jerome
- William Dear
- Sighting Man
- William Frankfather
- Schwarz
crew
- William Dear
- Director, Producer, Screenwriter
- Richard Vane
- Producer
- Steven Spielberg
- Producer
- Ezra D. Rappaport
- Screenwriter
- Richard Christian Matheson
- Screenwriter
- Thomas Szollosi
- Screenwriter
- William E. Martin
- Screenwriter
- Allen Daviau
- Cinematographer
- Bruce Broughton
- Composer (Music Score)
- Donn Cambern
- Editor
- Don Woodruff
- Production Designer, Art Director
- James D. Bissell
- Production Designer, Second Unit Director
- William Matthews
- Production Designer
- Jim Teegarden
- Set Designer
- Linda de Scenna
- Set Designer
- Denise Schlom
- Costume Designer
- Peter V. Saldutti
- Costume Designer
- Willie D. Burton
- Sound/Sound Designer
- Rick Baker
- Special Effects
- L. Andrew Stone
- First Assistant Director
- Jane Feinberg
- Casting
- Judy Taylor
- Casting
- Mike Fenton
- Casting
- Ted Adams Swanson
- Production Manager
- Anne Gordon
- Animal Trainer/Wrangler
- Richard L. Anderson
- Supervising Sound Editor

