Captain Peacock says that Mr. Humphries was "a sensation as Scarlet O'Hara in our production of 'Gone with the Wind', all eyes were upon you", to which Mr. Humphries replies "That's not surprising; Mr. Rumbold was playing Clark Gable."
When Mr. Humphries and Mr. Spooner are taking Mr. Grace's picture with his secretary and his nurse on his knee, Mr. Spooner says it's just lika scene from "Dallas".