Cast:

• Jonah Hill Frank
• Jennifer Garner Jennifer
• Jason Bateman Doctor
• Patrick Stewart Narrator
• Tina Fey Shelley
• Rob Lowe Rob
• Jeffrey Tambor Anthony
• Ricky Gervais Mark
• Christopher Guest Nathan Goldfrappe
• Stephanie March
• Jimmi Simpson Bob
• Dreama Walker Receptionist
• Nathan Corddry
• Fionnula Flanagan Martha
• Louis C.K. Greg
• Stephen Merchant
• John Hodgman
• Roz Ryan Nurse Barbara
• Ashlie Atkinson Jill
• Bobby Moynihan Mark's Assistant
• Lisa Gerber Addie
• Karl Pilkington
• Ken Cheeseman Shouting Man
• Luz Alexandra Ramos Chip Woman
• Bates Wilder Caveman
• Donald Foley Yelling Man
• Susan Farese Nurse Kelly
• George J. Vezina Caveman
• Michael Patrick Gough Homeless Man
• Morgan O'Brien Caveman
• Michele Proude Hostess at Fancy Restaurant
• Jared Voss Person #1
• Lance Norris Man #1
• Dennis Lemoine Young Man
• Danielle Perry Hostess in La Boniche
• Valerie Hager Talking Head Woman
• Patrick Mel Hayes Film Editor
• Sabe Schoeneg Croupier
• Douglass Bowen Flynn Tourist #1
• Jessica Baade Person #2
• Ellen Becker-Gray Woman Flirting with Mark
• Leigh Belair Movie studio tourist
• Christine Blackburn Attractive Cavewoman
• Desiree April Connolly Flirtatious Woman
• Nicki Connors Press Photographer
• Jeffrey Corazzini News photographer
• Diane Curran Apartment Crowd / Townsperson
• Vincent J. Earnshaw Apartment Crowd Photographer
• Scott C England Photographer
• Kevin Fennessy Lecture Films Exec.
• David J. Garfield Waiter
• Susan Garibotto Townsperson
• Jennifer Gjulameti Photographer
• Albert Gornie Pedestrian
• Sophya Gudelman Wedding Guest
• Haytham Kandil Driver
• Mercedes Maria Secretary
• Dan Marshall Reporter
• Jason Mulcahy The Emotional Citizen
• Alan Resnic Apartment Crowd
• Joe Stapleton Man #8
• David Szehi Restaurant patron
• William Todisco Caveman
• Nick Towne Roulette Dealer
• Marc Vos Wedding Guest
• Donald Warnock Lecture Films Exec.