The movie then just sort of peters out, rather differently from Susann's novel in which the heroine, drugged and dazed from a night of LSD and group sex, traipsed out into the ocean to her presumed demise!
Miss Smith took this part, it had been fourteen years since her previous feature film (1959's The Young Philadelphians!) Hardly idle during that time, she had done some TV work and honed her skills on stage, the most remarkable example being her triumphant 1971 Broadway appearance in Follies, which landed her on the cover of Time magazine and netted her a Tony award.
Airport '77, she got to punch Grant in the face, dropping her to the floor! Still at it, in a variety of acting mediums, she is currently seventy-four.
Gary Conway in The Underworld, but he was given almost nothing to do here. The way his role comes off in his scant scenes, it wouldn't have been a stretch for the character to be gay, but it apparently wasn't the case, nor was it so in Susann's novel. It's just a case of a sketchily-drawn part with no real relevance leaving room for unwarranted speculation. He seemingly was, at some point, meant to have a bit more storyline as some posters featured him and referred to his character's ex-wife, but other posters covered up his face on the poster with a shot of the book!