Sheldon learns of an impending change in his living arrangements and decides to revert back to 2003, a simpler time before he met Leonard and Penny. Also, Howard and Raj form a band to play at the Comic Book Store.
Hammer and Whip: The Untold Story of Thor vs. Indiana Jones (feat. Kunal Nayyar & Simon Helberg) — The Big Bang Theory Cast
Raj & Howard write a "filk" song together; (repeats) Raj sings the song for Emily; (repeats) Footprints on the Moon perform at Stuart's shop as the gang and a crowd gather to hear them.