Ernest Borgnine doesn't appear in this film, because of a prior commitment to "Flight of the Phoenix"
Henry Beckman and Jacques Aubuchon play different characters than they did in the TV series. Additionally, several other actors, including Jean Hale, Susan Silo and Mako, had guested on the series in different roles.
With the absence of the star player in this film, Borgnine was flabbergasted that he was not initially asked to appear in the movie. Moreover, Borgnine never got a clear explanation why he was not even asked to appear in this movie. Some critics believe that Borgnine refused to be in this movie due to a salary dispute but that was not the case. The producers were on a tight budget keeping production costs down giving Conway and Flynn more screen time.
Final film of Sally Mansfield.