Guest Stars Anthony Andrews as Tony Selkirk Harry Morgan as Professor Milo Endler Katherine Helmond as Vivian Endler José Ferrer as Deke Donner Michelle Phillips as Barbara Carroll Patrick Duffy as Ralph Sutton Donna Dixon as Jill Jenilee Harrison as Connie Wilker Gary Frank as Dr. Barry Mason Patrick Ward as Mongala Delvene Delaney as Cruise Director Yvonne Petty Co Starring Brendan Lunney as David Selkirk Queenie Ashton as Mrs. Selkirk