Tom Gries Director John Forsythe Dr. Robert Kier Actor Pat Harrington Jr. Joe Tate Actor Katherine Woodville Claire Parlini Actor Season Hubley Ann Kilmer Actor Anthony Zerbe Dr. Albert Scanlon Actor Beverly Garland Laura Kier Actor John McIntire Dr. Ernest Wilson Actor Lance Kerwin Kennedy Brown Actor Michael C. Gwynne Dr. Anton Balinowski Actor Shelly Juttner Nikki Kier Actor Christian Juttner Vince Kier Actor Ellen Weston Barbara Actor Liam Dunn Mr. Addison Actor Bill McKinney Mr. Brown Actor John Furia Producer