Aboard a train on their way to San Francisco for a symposium held by Dr. George Smoot, each of the guys has their own separate problems on the train. While Sheldon is desperately finding a way to retrieve his paper he forgot at home, Leonard tries to get some sleep, but it’s difficult with Sheldon’s constant nagging. Meanwhile, Koothrappali and Howard attempt to hit on an actress they spot on the train (Summer Glau, “The Terminator”), but they fight about who should get her and they both destroy one another’s chances at love.