Characters played by Martin Sheen
Paul Andrews
Characters played by Christian Slater
Eric Michaels
Characters played by Robert Foxworth
Richard Michaels
Characters played by Sharon Stone
Laurie McCall
Characters played by Olivia d'Abo
Mara Simons
Characters played by F. Murray Abraham
Dr. Harry Bertram
Characters played by Don S. Davis
Phil Clawson
Characters played by William S. Taylor
Dr. Willis
Characters played by Babs Chula
Anne Michaels
Characters played by Terence Kelly
Al Fletcher
Characters played by Freda Perry
Cynthia Rogers
Characters played by Campbell Lane
Alex Stamas
Characters played by William B. Davis
Hal Simon
Characters played by Ilena Cary
Ellie Keller
Characters played by Robert Benedetti
NASA
Characters played by Christine Anton
Mrs. Keller
Characters played by Samantha Halander
Ellie's Sister
Characters played by Ghislaine Crawford
Kim
Characters played by Michael Naxos
Mr. Rosetti
Characters played by Zack
Laurie's Dog
Characters played by Sandy Knittle
Moon Midget