Robin Williams as Tom Dobbs

Christopher Walken as Jack Menken

Laura Linney as Eleanor Green

Lewis Black as Eddie Langston

Jeff Goldblum as Stewart

David Alpay as Danny

Faith Daniels as Moderator

Tina Fey as Tina Fey

Amy Poehler as Amy Poehler

Doug Murray as Mathias

Richard Sher as Newsman

Chris Matthews as News Anchor #1

James Carville as Political Commentator #1

Rick Roberts as Hemmings

Karen Hines as Alison McAndrews

Linda Kash as Jenny Adams

David Nichols as President Kellogg

David Ferry as Senator Mills

Dmitry Chepovetsky as Eckhart

Brandon Firla as Grimaldi

Sasha Roiz as Donald Tilson

J.C. Kenny as News Anchor #2

Jeff Mallory as Angus

Mark Andrada as Young Guy

Marcia Laskowski as Marjorie

Kim Roberts as Make-Up Artist

George King as Motel Manager

Sabrina Sanchez as Sales Girl

Jacqueline Pillon as Security Tech

Zoe Doyle as Woman in Audience

Chris Gillett as Head of Alliance

Ho Chow as Dr. Nash

Mickey Sherman as Talking Head Lawyer

Lee Taylor as CNN Business Reporter

Brendan Connor as Reporter #1

Barbara Radecki as Reporter #2

Audrey Dwyer as Reporter #3

Michael Anscombe as Reporter #4

Sandi Stahlbrand as Reporter #5

Anwar Knight as Weather Man

Shawn Roberts as Pick-Up Truck Driver

Jean Daigle as Driver

Gary Douglas as Pick-Up Truck Driver Accomplice

David Marsden as Delacroy Commercial Narrator

Robin White as Senator Wentworth

Billy Parrott as Hypodermic Man

Martin Doyle as EDC Chairman

Kevin Hare as Man

Reuben Thompson as Paramedic

James Kall as Policeman

Raynor Scheine as Mechanic

Catherine Crier as Political Commentator #2