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Matthew Broderick as Richard Feynman |
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Patricia Arquette as Arline Greenbaum |
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Peter Riegert as Mel Feynman |
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Jeffrey Force as Young Richard |
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David Drew Gallagher as Harold |
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Raffi Di Blasio as Robert |
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Josh Keaton as David |
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James Hong as Abacus Adder |
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Melissa DeLizia as Young Joan |
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Peter Michael Goetz as Dr. Gell-Mann |
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Kelly Wolf as Nurse Kate |
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Mary Pat Gleason as County Nurse #2 |
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Joyce Van Patten as Aunt Ruth |
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James Le Gros as John Wheeler |
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Željko Ivanek as Bill Price |
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Joshua Malina as Calculator Kid #3 |
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Matt Mulhern as Gate Guard |
| Directing | Matthew Broderick | Director |
| Production | Matthew Broderick | Producer |
| Production | Patricia Broderick | Producer |
| Production | Joel Soisson | Producer |
| Sound | Bruce Broughton | Original Music Composer |
| Production | Lisa Bankert | Casting |
| Writing | Patricia Broderick | Screenplay |
| Camera | 栗田豊通 | Director of Photography |
| Editing | Elena Maganini | Editor |
| Editing | Bill Johnson | Editor |
| Editing | Amy Young | Editor |
| Art | Bernt Amadeus Capra | Production Design |
| Art | Jeff Schell | Art Direction |
| Costume & Make-Up | Mary Jane Fort | Costume Design |
| Editing | Marc Wielage | Digital Colorist |
| Writing | Richard Feynman | Author |
| Writing | Ralph Leighton | Author |
| Production | Philippe Caland | Executive Producer |
| Production | Philip Euling | Associate Producer |
| Production | Michael Leahy | Producer |
| Art | Susan Benjamin | Set Decoration |
| Costume & Make-Up | Theo Mayes | Key Hair Stylist |
| Costume & Make-Up | Angela Moos | Key Makeup Artist |
| Costume & Make-Up | Peggy Nicholson | Hairstylist |
| Costume & Make-Up | Rosemary Zurlo | Makeup Artist |
| Production | Don Phillips | Co-Producer |
