Guest Stars Allen Case as Lt. Commander Johnson Lawrence Pressman as Commander Phil Roth Joshua Bryant as Dr. Doug Berkley Steve Franken as Doctor Mark Jenkins as Lt. Ainsley Co Starring Philip Baker Hall as George Robert Phalen as Habitat Technician Virginia Gregg as Whale Scientist James Chandler as Man on Beach Charles Davis as British Scientist Alex Rodine as Russian Scientist Marguerite DeLain as First Receptionist Lilyan Chauvin as French Scientist Michael J. London as Popeye Philip Tanzini as Boy at Phone Booth Curt Lowens as Emil Connie Izay as First Nurse Vincent Duke Milana as American Scientist Judd Laurance as Intern Cheryl Robinson as X-Ray Technician Scott Stevenson as Boy on Beach Peter Weiss as Test Lab Assistant Trudy Marshall as Woman at Party Robert Dore as Diver Patricia Anderson as Second Receptionist Akemi Kikumura as Third Receptionist Larry Holt as Ambulance Driver Maralyn Thoma as Second Nurse Phillip Roye as Intern Michael Watson as Diver
