In her letter to Curtis Norton accepting his proposal of marriage, Ann Harris says " At first, as you know, I had my doubts, but like Jeanette MacDonald in 'Rose-Marie' your last beautiful letter completely swept aside all my doubts."
Mentioned by Compo.
Kojak mentions Nelson Eddy, Jeanett MacDonald and the song "Rose Marie".
Edith mentions her fave movie which she saw 7 times & its stars Nelson Eddy & Jeanette MacDonald by name
Tom: Did you see Jeanette MacDonald and Nelson Eddy in 'Rose Marie'?
Both Compo and Clegg mention Nelson Eddy's role as a Canadian mountie in the film.
The characters of Reggie Van Justice and his wife are parodies of Sgt. Bruce and Marie de Flor. The movie evens has them singing "Indian Call" when they first arrive.