Guest Stars Mark Jenkins as Lt. Ainsley Allen Case as Lt. Commander Johnson Steve Franken as Doctor Lawrence Pressman as Commander Phil Roth Joshua Bryant as Dr. Doug Berkley Co Starring Philip Baker Hall as George Virginia Gregg as Whale Scientist Marguerite DeLain as First Receptionist Lilyan Chauvin as French Scientist Philip Tanzini as Boy at Phone Booth Judd Laurance as Intern Alex Rodine as Russian Scientist Michael Watson as Diver 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 Cheryl Robinson as X-Ray Technician 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 Scott Stevenson as Boy on Beach Curt Lowens as Emil
