Season 8, Episode 1 - The Locomotion Interruption
Aired September 22, 2014
After spending forty-five days riding the rails, Sheldon's cross-country journey comes to an end in Arizona when he is robbed on a sleeper train. In need of assistance, Leonard and Amy must drive out to Arizona to pick him up.
Meanwhile, Bernadette helps Penny get a job interview at her pharmaceutical company, and Howard is freaked out by how close Stuart and Mrs. Wolowitz have become.