The closing song in the episode is "Magnets, Pt. 2" by Slothrust, which is also the band behind the shows theme, "7:30 Am".
Jimmy asks Edgar to buy him the traditional British snack foods Shrimp-flavoured crisps, Wallenger's Choco-Knockers, Tartar biscuits, Lemingtons, Fluffingtons, Rum Christophers, and Salted Liquorice Knib-Knobs.
None of these are real, although some seem to be parodying real snacks such as Prawn Cocktail crisps, Lamingtons (an Australian cake), and Hob-Knob biscuits.
Killian tells Jimmy he never says "Thank you" for taking dictation to which Jimmy responds "That's what the money's for!" This is a Peggy/Don exchange on Mad Men.