The Psychic Vortex

Actress Danica McKellar appeared on this episode when Sheldon and Raj meet her character Abby while attending a mixer at the university. In the episode The Bat Jar Conjecture (2008), Raj says, "How about the girl from The Wonder Years (1988)?" He is referring to Danica McKellar, who has a degree in mathematics.

Sheldon generally can't stand someone entering his room, yet he lets Martha in. However, his hesitation and the "audience" response upon approval suggest that this isn't a goof, but a deliberate plot twist showing that Sheldon likes Martha so much as to allow her to be in his room (providing that he himself is not there).

CHUCK LORRE PRODUCTIONS, #273 I am writing this vanity card from deep in the jungles of Borneo. The heat is oppressive. The mosquitoes are relentless. And the natives.... the natives are hungry for meat. American meat. Specifically, ground chuck. What was I thinking coming here for my Xmas break? What insanity led me to this godforsaken hell?! Oh, how I wish I were back in Burbank. Oh, Burbank, Burbank, Burbank! Forgive me for not seeing your beauty when you thrust it in my face. But now that matters not. Or, that matters not now. Either way, my time is running short. Funny how your perspective changes when the end is near. Being overlooked by the Golden Globes, yet again, seems so unimportant to me now. The fact that one of the natives about to eat me is a freelance show biz reporter for the Kota Kinabalu Daily Bugle and a voting member of the Hollywood Foreign Press even provides me with some comfort. For as I close my eyes on this world I'll at least know that while I may not be to everyone's taste as television, if sauteed with butter and lemon, I will be to everyone's taste as lunch.