Raj Koothrappali: Pay attention! Leonard, Sheldon, and Howard. They built a vari-state quantum interference device.
Bert: That would have been my guess.
Raj Koothrappali: It malfunctioned, and it changed everything, right? The universe, uh, history... [whispers] ...reality.
Stuart: Yeah, yeah, great. How... How do we fix it?
Raj Koothrappali: Yeah, that's a toughie. Why you ask? [pants] Wait, did you ask? I assume you ask. It's a toughie because we're all prisoners of the Evil One. And the Evil One likes everything to stay just... [whispers] ...as it is.
Denise: Who's the Evil One?
Raj Koothrappali: [groans] I can't say his name! If I say his name, bad things happen.
Stuart: [sighs] Sorry, is it Voldemort?
Raj Koothrappali: I wish it was Voldemort. That's a guy you can reason with.