Although credited, Rich Sommer (Harry Crane) and Aaron Staton (Ken Cosgrove), do not appear in this episode.
Roger: I have to warn you, they won't know it's over until you drop the big one, twice.
Pete Campbell tells Don Draper that the meeting with the Honda executives was a "Margaret Dumont" sized disaster.
Margaret Dumont (1982-1965) was a large actress who played the buffoonish foil in seven Marx Brothers comedies. Using a haughty voice, with ladylike civility and apparently clueless to all of Groucho Marx's better satirical lines, Dumont added a comedic version of social stability to Marx Brothers comedies while Groucho, Chico and Harpo trashed her expensive high society parties, a ship's stateroom or an opera. Groucho always credited her for adding to the comedy and she was sometimes called the fifth Marx brother.
Phoebe: She probably wanted to look older, like Hayley Mills. Hayley Mills was a popular young actress in the 1960's known for her roles in several Walt Disney films, such as Pollyanna, Parent Trap and Summer Magic.
Roger: This Selma thing is not going away. This is referring to the three marches marking the political peak of the American Civil Rights Movement in Selma, Alabama.
The Chrysanthemum and The Sword: Patterns of Japanese Culture is a book about a study of Japan by author, Ruth Benedict.