Because if you haven't seen this already, you really should
I have never watched a full episode of The Big Bang Theory but I know it's awesome. I've seen enough clips to know that :) And yes, I am planning on actually watching the show properly at some point. I am a big fan of Craig Ferguson too - best chat show host ever. And this adorable sketch from his show - where he has to pass a sci-fi & fantasy geek test in order to become the lead characters' friend, filmed on BBT's actual set and everything - is frigging perfect. It could easily fit into an episode. Check it out. You won't be disappointed.