[s2e21] The Vegas Renormalization Direct

The UK channel E4 famously skipped this episode in daytime slots for years due to the prostitution storyline.

By the time Leonard returns, Sheldon claims to have a better understanding of "friends with benefits," a concept he learned from Penny, which hilariously confuses Leonard. Fun Facts & Trivia

Back in Pasadena, Sheldon plans a glorious weekend of being alone, eating Indian food that the others can't have due to allergies or personal distaste (paneer). [S2E21] The Vegas Renormalization

Sheldon ends up taking over Penny's bed and annoying her into singing "Soft Kitty" because he feels "homesick".

Leonard and Raj hire a prostitute named Mikayla (played by Jodi Lyn O’Keefe ) to pose as a Jewish girl named "Esther Rosenblatt" to cheer him up. The UK channel E4 famously skipped this episode

Howard eventually realizes she’s a professional but, instead of being offended, is deeply touched that his friends would do that for him and continues the "experience". Sheldon's "Fortress of Solitude"

This is the first time we hear Raj’s full name, including his middle name, Ramayan . "The Big Bang Theory" The Vegas Renormalization ... - IMDb Sheldon ends up taking over Penny's bed and

Leonard and Raj take a depressed Howard to Las Vegas to help him forget his heartbreak. When Howard refuses to leave his hotel room—spending his time stalking Leslie on Facebook and posting "depressing Twitters"—the guys decide to take drastic measures.