Continuity: At the end of this episode, Raj says that he puts liquor in his dog's water bowl and that he (the dog) is "an angry drunk". However, when he is given the dog by Howard and Bernadette at the end of season 5, they explain that the dog is a female.
Judging from the laptop computer Howard uses, he is not on the International Space Station nor even in space as in real life the only models currently in use there are the IBM Thinkpad A31p and the Lenovo Thinkpad T61p, and the laptop used in the episode is clearly neither. No other models, except for three older IBM Thinkpad models no longer in use, have been certified by NASA for operating in space.
Amy: If you don't tell me something meaningful and from the heart then we're done.
Sheldon: OK sit down, please (looking in her eyes) When I look into your eyes, and you look into mine, I don't feel quite normal. I feel stronger and weaker at the same time. I feel excited and at the same time, I feel terrified, and honestly I don't know what I'm feeling, but I know the kind of man I want to be.
Amy: Sheldon... that was beautiful!
Sheldon: It should be, it's from the first Spiderman movie.
The opening presentation is still the same, but they've changed the last shot again (where the gang is eating) for an updated one including Amy and Bernadette. This is the third time they've changed it since the original last shot in season 1.
Kevin Sussman (Stuart) is added to the opening credits and is now featured as a starring character.
Original International Air Dates:
Canada: September 27, 2012 on CTV
United Kingdom: November 15, 2012 on E4/E4 HD
Turkey: September 2, 2013 on CNBC-e
Finland: November 28, 2013 on Sub