Leonard and Penny have sex for the first time since The Lunar Excitation.
Leonard wielding a lightsaber as a weapon and flashlight (while investigating a noise) is a hold-over from the Unaired Pilot.
List of The Big Bang Theory characters - The Big Bang Theory Wiki, The Big Bang Theory Network.
Last appearance of Sheldon's and Leonard's laptops (a Red Dell XPS and a Dell XPS respectively) before they are stolen in The Bozeman Reaction and replaced by an Alienware Nebula Red Laptop (Sheldon) and a Dell XPS Adamo Laptop (Leonard).
The Big Bang Theory - Sweet Bernadette Song - Watch Your Favourite TV Episodes
'The Big Bang Theory' Season 6 Premiere Photos
Sheldon and Amy - The Big Bang Theory Wiki
Join this gang for dinner and a show.an all new tonight!
Amy (Mayim Bialik) and Bernadette (Melissa Rauch) ~ The Big Bang Theory ~ Episode Scenes ~ Season Episode 1 - The Hofstadter Insufficiency