"The Itchy Brain Simulation" (Season 7, Episode 8) centers on Leonard attempting to cope with Sheldon's psychological experiment, which forces him to wear a scratchy sweater to experience Sheldon’s "itchy brain" anxiety over an overdue DVD. The episode, highlighting Sheldon’s manipulative control and featuring a cringe-worthy subplot with Raj and his ex-girlfriend Lucy, is often highlighted for its creative physical comedy. For more detailed episode guides and fan discussions, visit the Big Bang Theory Wiki. What's the best season? (Season 7 vs. Season 8) and why?