Amazingly this movie was spun off into a television sitcom! In the fall of 1973 ABC developed this movie into a sitcom and aired it on it's Fall Schedule for seven episodes, before it was cancelled (to awful ratings and reviews). Most of the subtext about wife-swapping was eliminated; predictably, (since this was 1973 and they really couldn't explore issues like that on network television), which makes one wonder what Screen Gems was thinking about in the first place. The show is most memorable for it's inclusion of a young Jodie Foster in the cast as Elizabeth Henderson, Ted and Alice's daughter.
Bill Cosby: wearing a hat and sunglasses. He bumps into Bob in the night club scene while Bob and the others head for their table. He and Robert Culp starred together on I Spy (1965). This cameo, incidentally, marks his film debut, as he would not have a featured role in a movie until 1971.