While Sheldon goes to Vegas to win millions of dollars for science, Penny and Bernadette take Amy shopping for wedding dresses.
Michael tries to impress one of Pam and Jim's friends; Erin and Andy try to keep their relationship a secret; Dwight reconsiders his contract with Angela.
The BAU searches for an UnSub who is purposely disfiguring victims. Meanwhile, Rossi has an awkward reunion with his ex-wife.
Christy gets promoted to restaurant manager.
In the aftermath of Tara's miscarriage, Jax learns new secrets that turn his world sideways; a mysterious girl vandalizes the new club house.