Philip Seymour Hoffman
Dustin Davis
Bill Paxton
Bill Harding
Cary Elwes
Dr. Jonas Miller
Lois Smith
Meg Greene
Alan Ruck
Robert 'Rabbit' Nurick
Richard Lineback
Mr. Thornton
Richard Lineback
Mr. Thorton
Jeremy Davies
Laurence
Todd Field
Tim 'Beltzer' Lewis
Anthony Rapp
Tony
Zach Grenier
Eddie
Helen Hunt
Dr. Jo Harding
Jami Gertz
Dr. Melissa Reeves
Sean Whalen
Allan Sanders
Scott Thomson
Jason 'Preacher' Rowe
Joey Slotnick
Joey
Wendle Josepher
Haynes
Gregory Sporleder
Willie
Abraham Benrubi
Bubba
Jake Busey
Mobile Lab Technician
Rusty Schwimmer
Mrs. Thornton
Rusty Schwimmer
Mrs. Thorton
Nicholas Sadler
Kubrick
Patrick Fischler
The Communicator
Alexa PenaVega
Jo Harding age 6
Bruce Wright
Murphy, NSSL Scientist
Ben Weber
Stanley
Darryl Cox
Four Corners Mechanic (uncredited)
Taylor Gilbert
Bryce, NSSL Scientist
Erik LaRay Harvey
Eric
Melanie Hoopes
Patty