In the 6th season finale, the team investigates the disturbing, unidentifiable remains of a bowler that were found jammed in one of the bowling alley's automatic pinsetters. After hitting a dead end in the case, Booth and Brennan decide to go undercover and join a competitive bowling team in search of answers.

News of Meredith's dishonesty in the clinical trial comes to light, leading to unanticipated consequences for her and others; Cristina finds herself in a compromising situation, which forces her to decide between her career and her relationship; Owen posts his decision for Chief Resident, and Teddy makes a surprising choice regarding her love life -- and her future.

Dave welcomes Kelly Ripa, X-Men's Jennifer Lawrence and the cast of the Broadway's "How to Succeed in Business Without Really Trying." Plus: What Would Chris Rock Do?

Everyone in the office is unhappy when Chris decides to make some big changes in the parks department -- especially Tom who starts to question his career choices. Leslie is caught off guard when Ben has a meeting with her mom.

Leslie and the parks team put together a memorial service for a dearly departed friend. Meanwhile, Tom makes a big life decision, while Chris reacts badly to a health problem.

When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she's regrets.

John Lithgow performs Gingrich's press release, and Kareem Abdul-Jabbar discusses the Harlem Rens.

Robot Sidekick Geoff becomes finally sentient and reveals some of his many, MANY domiciles all over the world. He invites Craig to 'throw beads at people', 'go fishing' ...

John's mole in the CBI is revealed and Patrick Jane finally meets Red John in an explosive confrontation with shocking repercussions for the CBI team.

Patrick Jane finally meets Red John in an explosive confrontation with shocking repercussions for the CBI team.

Deangelo's new replacement is sought out through a search committee process led by Jim.

Deangelo's new replacement is sought out through a search committee process led by Jim.