2 Works in Big Bang Big Bang
Life as a new FBI recruit is nothing like Penny expected, but it's better than sitting around waiting for Kurt to grow up. Until she gets pulled out of training a few weeks early, that is. On the plus side: no more pre-dawn obstacle course runs; but partnering with the Bureau's resident crackpot? This is so not what she signed up for. She's ready to toss her shiny new (provisional) badge in the Potomac, until Agent Cooper gives her a look at the first case they'll be investigating - something the Bureau hasn't seen in almost fifty years.
When Penny meets Wil again, she's completely charmed. Can she prove to Sheldon that Wil is not as evil as Sheldon claims? Or is Sheldon right?