Matthew Broderick
Richard Feynman
Acting
Patricia Arquette
Arline Greenbaum
Acting
Peter Riegert
Mel Feynman
Acting
Jeffrey Force
Young Richard
Acting
David Drew Gallagher
Harold
Acting
Raffi Di Blasio
Robert
Acting
Josh Keaton
David
Acting
James Hong
Abacus Adder
Acting
Melissa DeLizia
Young Joan
Production
Peter Michael Goetz
Dr. Gell-Mann
Acting
Kelly Wolf
Nurse Kate
Acting
Mary Pat Gleason
County Nurse #2
Acting
Joyce Van Patten
Aunt Ruth
Acting
James Le Gros
John Wheeler
Acting
Zeljko Ivanek
Bill Price
Acting
Joshua Malina
Calculator Kid #3
Acting
Matt Mulhern
Gate Guard
Acting