The movie Peggy and Don were seeing was ''Casino Royale''
The line "Look on my works, ye Mighty, and despair!"that Ginsburg quotes is from the poemOzymandias; by Percy Bysshe Shelley. And as suggested by the character Stan Rizzo he is missing the thrust of the meaning.
The use of the Beatle's Tomorrow Never Knows cost $250,000.
The movie that Abe talks about to Peggy is called "Naked Prey".
In this episode Don and Harry try to get the Rolling Stones to endorse Heinz Beans.
In 1967, The Who released an album titled The Who Sell Out in which the cover art has Roger Daltrey bathing in Heinz Beans.
I don't think this is a coincidence. What was Matt Weiner trying to say? Don did not think it was a good idea and the band agreed?