Also Known As:
.
- Um Homem Sério
- Un hombre serio
- Alvarlegur maður
- Ciddi bir adam
- Egy komoly ember
- Enas sovaros anthropos
- Ozbiljan covjek
- Powazny czlowiek
- Tõsine mees
- Un tipo serio
- Yehudi Tov
- Ethan Coen
- Joel Coen
- Ethan Coen
- Joel Coen
- Michael Stuhlbarg ... Prof. Lawrence 'Larry' Gopnik
- Richard Kind ... Uncle Arthur
- Fred Melamed ... Sy Ableman
- Sari Lennick ... Judith Gopnik
- Aaron Wolff ... Danny Gopnik
- Jessica McManus ... Sarah Gopnik
- Peter Breitmayer ... Mr. Brandt
- Brent Braunschweig ... Mitch Brandt
- David Kang ... Clive Park
- Benjy Portnoe ... Danny's Reefer Buddy
- Jack Swiler ... Boy on Bus
- Andrew S. Lentz ... Cursing Boy on Bus
- Jon Kaminski Jr. ... Mike Fagle
- Ari Hoptman ... Arlen Finkle
- Alan Mandell ... Rabbi Marshak
- Amy Landecker ... Mrs. Samsky
- George Wyner ... Rabbi Nachtner
- Michael Tezla ... Dr. Sussman
- Katherine Borowitz ... Friend at the Picnic
- Steve Park ... Clive's Father (as Stephen Park)
- Allen Lewis Rickman ... Velvel - Shtetl Husband
- Yelena Shmulenson ... Dora - Shtetl Wife
- Fyvush Finkel ... Treitle Groshkover - Dybbuk
- Ronald Schultz ... Hebrew School Teacher
- Raye Birk ... Dr. Shapiro
- Jane Hammill ... Larry's Secretary
- Claudia Wilkens ... Marshak's Secretary
- Simon Helberg ... Rabbi Scott
- Adam Arkin ... Divorce Lawyer
- Jim Cada ... Cop #1
- Michael Lerner ... Solomon Schlutz
- Charles Brin ... Hebrew School Principal
- Michael Engel ... Torah Blesser
- Tyson Bidner ... Magbiah
- Phyllis Harris ... Hebrew School Tea Lady
- Piper Sigel-Bruse ... D'vorah Piper (as Sigel Bruse)
- Hannah Nemer ... Sarah's Friend
- Rita Vassallo ... Law Firm Secretary
- Warren Keith ... Dick Dutton (as Warren David Keith)
- Neil Newman ... Cantor
- Tim Russell ... Detective #1
- Jim Lichtscheidl ... Detective #2
- Wayne A. Evenson ... Russell Krauss (as Wayne Evenson)
- Scott Thompson Baker ... Sci-Fi Movie Hero (as Scott Baker)
- Landyn Banx ... Physics Student
- Alana Bloom ... Physics Student
- Rita Cannon ... Physics Student
- Matt Cici ... Physics Student
- Devon A Early ... Physics Student
- John Edel ... 1960s Beach Party Attendee
- Rachel Grubb ... Bar Mitzvah Guest
- Sherilyn Henderson ... Neighborhood Kid
- Steven Wothe Jr ... Bar Mitzvah and Funeral Guest
- Punnavith Koy ... Physics Nerd
- Nicole Kruex ... Physics Student
- Lauri Mueller ... Bar Mitzvah and Funeral Guest
- Helen Murray ... Grocery Store Patron
- Lisa Pechmiller ... Bar Mitzvah Guest
- Asher Pink ... Bar Mitzvah Guest
- Benjamin Terry ... College student
.