- Title: The Big Bang Theory – The Hot Tub Contamination
- wiki: link
Disagreements arising from Sheldon (Jim Parsons) and Amy‘s (Mayim Bialik) attempts to live together provide the show a chance to offer some interesting pairings in “The Hot Tub Contamination.” While the episode derives its title from the (less interesting) B-story involving Howard (Simon Helberg) and Bernadette‘s (Melissa Rauch) discovery of what happens in their home when some of their friends think they aren’t around, more interesting is the pairing of Penny (Kaley Cuoco) and Sheldon, which delivers the truth behind Sheldon’s committal to always knock three times, and the far-less developed camaraderie between Leonard and Amy who do some bonding of their own over the whackadoodle they both know and love.