Inside Joke w/ Monty Woolley
When Prof. Wutheridge asks Dudley, "Where have I seen you before ?" it's a sly reference to the movie "Night & Day," released the year before "Bishop's Wife." In N&D, Grant played Cole Porter, while Monty played one of his professors (!) at Yale, who fosters Porter's career. (The Professor in N&D, strangely enough, is named Prof. Monty Woolley --- in real life, before becoming a movie actor, Woolley had actually been a prof at Yale, and had indeed fostered Cole Porter's career.)
"J'ai l'oeil AMÉRICAIN !"