When Sheldon hands Raj a roommate ID, the ID features a logo of "a gold lion rampant on a field of azure" similar to the apartment flag featured during flashback scenes of "The Staircase Implementation".
Penny:: (enters with laptop) Hey Sheldon, did you change your WiFi password again?
Sheldon:: Yes, it's "Penny, get your own WiFi," no spaces.
(ordering at the Cheesecake factory)
Priya: I'll have the shepherd's pie. Leonard, do you want to split it with me?
Penny: No, no…
Priya: Why not?
Penny: You know, milk in the taters, milk in the gravy, Parmesan crust, your lactose intolerant boyfriend will turn into a gas-filled Macy's day balloon! (everyone laughs)
Sheldon: Not quite accurate. Macy's day balloons are filled with helium, whereas Leonard produces large amounts of methane. (everyone laughs, then Sheldon joins in)
This episode's end titles has Chuck Lorre's Vanity Card #347.
International Airdates: United Kingdom: September 15, 2011 on E4; Turkey: December 6, 2011 on CNBC-e; Czech Republic: December 14, 2011 on Prima COOL; Slovakia: December 22, 2011 on Markiza