Was watching "Two on the Aisle", the very funny episode where Oscar tricks Felix into doing theater reviews for him, with my 17 year old son (who loves the show). My son noticed that Myrna (Penny Marshall) was present in the episode, and asked me didn't she leave the show at the beginning of Season 5. Lo and behold, she did, in first episode of the season, and the one we were watching was the 14th episode of Season 5. And, it was not like she returned or visited or anything, she was just there as Oscar's secretary. Since most people only have watched the Odd Couple in syndication, most people wouldn't have realized this, back before the DVD releases, and would have figured this to have occurred before Myrna left the show. My guess is that "Two on the Aisle" was filmed before the show where Myrna left, and was just held back for some reason, and not televised until later. Does anybody know what happened? Just curious....