Guest Stars Ian Tracey as Mr. Tarquin Teryl Rothery as Janet Preston Robert Foxworth as President Charles Halsey Diana Scarwid as Elizabeth Halsey Lawrence Dane as General Covington Dale Wilson as NORAD General Co Starring Jason Gray-Stanford as Airman Scott McNeil as Astronaut Bruce Harwood as Dr. Norris David Bloom as Expert Claire Riley as News Anchor Ewan Sudsy Clark as Congressman