William H. Macy
Paul Kirby
Alessandro Nivola
Billy Brennan
Mark Harelik
Ben Hildebrand
Julio Oscar Mechoso
Enrique Cardoso
Blake Michael Bryan
Charlie
Sarah Danielle Madison
Cheryl
Sonia Jackson
Symposium Leader
Bruce French
Science Reporter
Bernard Zilinskas
Male Student
Rona Benson
Female Student
Sean Coffey
Palentology Student (uncredited)
Karin M. Gaarder
Paleontology Student (uncredited)
Edward C. Gillow
University Professor at Symposium (uncredited)
Craig Richards
Billy's Bar Buddy (uncredited)
Brad Everett Young
Paleontology Student (uncredited)
