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