The Vegas Renormalization

Summary
Leslie ends her friends with benefits relationship with Howard. Sheldon suggests the guys go to Vegas to help Howard get over the pain. They do and end up hiring a prostitute (played by Jodi Lyn O'Keefe) to cheer him up. Meanwhile Sheldon locks himself out of his apartment and ends up spending the night with Penny.

Critics
"Typically funny and consistent. Typically unambitious and unchanging. Surprisingly immoral." - The TV Critic's Review