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