The best episode yet, and possibly one of the best out of the entire series according to TV.com, and there is complete truth to that. As I was watching this episode, I got all that I asked for in the last episodes review: a climax, something eventful happened finally. Penny & Leonard share a very eventful kiss at Penny's Halloween party, and I couldn't help but think of Friends as I was watching this episode. The ensemble manages to pull off great humor with everyone's costumes, and it just felt like something you'd see on that show. Trash talking for nerds, hilarious. The funniest thing about this episode was Leonard's clever and hilarious comebacks to Penny's ex, that was quite enjoyable. This was the best episode yet, and it shows here. A great episode of The Big Bang Theory, can't wait for the next episode. Even the supporting characters were great, Raj sleeping with someone would have to be as unexpected as Penny & Sheldon sharing a kiss!