Sam Neill

(Dr. Alan Grant)

William H. Macy

(Paul Kirby)

Tea Leoni

(Amanda Kirby)

Alessandro Nivola

(Billy Brennan)

Trevor Morgan

(Eric Kirby)

Michael Jeter

(Udesky)

John Diehl

(Cooper)

Bruce A. Young

(Nash)

Laura Dern

(Ellie)

Taylor Nichols

(Mark)

Mark Harelik

(Ben Hildebrand)

Julio Oscar Mechoso

(Enrique Cardoso)

Blake Bryan

(Charlie)

Sarah Danielle Madison

(Cheryl)

Linda Park

(Hannah)

Sonia Jackson

(Symposium Leader)

Bruce French

(Science Reporter)

Bernard Zilinskas

(Male Student)

Rona Benson

(Female Student)

Frank Clem

(Man in Suit)