Catherine O'Hara Becka Paulson Actor Mario Van Peebles Captain William Clark Actor Ryan Reynolds Paul Nodel Actor Kenneth Welsh Dr. Vasquez Actor Laura Harris Sarah Hayward Actor Matthew Walker Trevor Hunter Actor Teryl Rothery Dr. Lucy Cole Actor Don Franklin Tim McAllister Guest Star Marie Stillin Governor Mudry Actor Bruce Harwood Dr. Avery Strong Guest Star Lorena Gale Louise Guest Star Barry W. Levy Colonel Bell Actor Micki Maunsell Dolly Kellerman Guest Star Marilyn Norry Flo Actor Roman Podhora Commander Louis Vidwell Guest Star Colin Lawrence Technician Guest Star Gerard Plunkett Admiral Birch Guest Star Carrie Cain-Sparks Nurse Guest Star Alannah Ong Journalist Guest Star Jesse Moss Sean Tenzer Guest Star Pen Densham Executive Producer Richard B. Lewis Executive Producer John Watson Executive Producer Jonathan Glassner Executive Producer, Writer James Crocker Writer Brad Wright Writer Sam Egan Writer Scott Shepherd Writer Hart Hanson Writer Mario Azzopardi Director Chris Dickie Writer S. Barnes Writer Stephen King Writer Joseph Stefano Writer David Braff Writer Ken Girotti Director Melvin Van Peebles Director Joe Nimziki Director Brenton Spencer Director