John Kelly as Dr. Alstein and Mona Dolphin are in studio records/casting call lists for this movie. Kelly was not seen in the print, and since Mona Dolphin was the character name of Barney's wife, it is likely that no such actress existed. Ferdinand Gottschalk is listed for the role of Dr. Slenk, but that role was played by Murray Kinnell. Kitty Kelly and Robert Benchley were mentioned as cast members in a news item, but they did not appear in the movie.
Sarah Padden, who is listed as a black woman, supposedly played her role in black-face, since she is not black. She was not seen in the film, but may have been the prisoner executed by hanging. She is seen in long shot and is not recognizable. 'Reginald Barlow' is barely recognizable as the Chaplain following her and reciting a prayer. J. Carrol Naish has a very brief scene lying in bed in an alcoholic stupor. He has no lines. It is a credit to their agents that these three all received on-screen credits.
Director John Cromwell often played uncredited cameos in his films. In this one, he's the sad-faced doughboy at the settlement party; there are three good shots of him looking piningly at Irene Dunne.
Some objections were made by the Hays Office concerning the plot of the first draft of the screenplay, where Ann marries Captain Resnick and then has an affair with Barney. The plot was changed to Ann being seduced by the Captain with the offense somehow deemed less if only one of the parties in the adulterous affair is married. No reference is made about any abortion in the trip to Havana, and in the released print the cause of death of Ann's baby girl is never mentioned. RKO applied for an "Approved" certificate in 1935, when the production code was more rigorously enforced, but they were informed that no certificate would be given because of the film's attitude towards adultery.