What's on this Week? (5/16 - 5/22)

Monday: How I met your Mother: "Challenge Accepted" (06x24) (Finale)

Robin and Barney bond when they intervene in Ted's relationship (until they run into Nora), and Marshall and Lily watch a ticking clock as he fears that he soon will be the victim of food poisoning. Meanwhile, Ted performs his Best Man duties at a very important wedding.

Monday: Gossip Girl: "The Wrong Goodbye" (04x22) (Finale)

Season four wraps up with an explosive finale, including the return of Georgina Sparks and Constance Billard mean girls Kati and Is, a cameo by "Gossip Girl" author Cecily von Ziegesar, a performance by Airborne Toxic Event and, oh yeah, a few very juicy cliffhangers.

Monday: House: "After Hours" (07x22)

Thirteen’s ex-con friend, Darrien, arrives at Thirteen’s apartment unannounced and in need of urgent medical attention. When she finds out that her friend has relapsed into drug use, Thirteen promises not to take her to the hospital where the cops could find her and instead turns to Chase in desperation. Meanwhile, House deals with devastating information, and Taub begins to come to terms with surprising news.

Monday: Chuck: "Chuck vs. The Cliffhanger" (04x24) (Finale)

Before he can kiss the bride, Chuck must enlist his wedding party to take down Vivian Volkoff and stop her from destroying the big day. When he turns to Alexei Volkoff for help, the CIA sends its toughest agent, Clyde Decker, to stop them.

Monday: Castle: "Knockout" (03x24) (Finale)

Kate Beckett's investigation into her mother's death is reactivated when Hal Lockwood - a professional hit man with knowledge of Beckett's mother's murder - stages a spectacular escape during a court hearing. As police launch a manhunt for Lockwood, Castle and the team uncover evidence of a deeper conspiracy involving a mysterious figure with law enforcement connections who is linked to both Lockwood's escape and the killing of Johanna Beckett. The search for Lockwood and the quest to identify his co-conspirator leads to a shocking and deadly conclusion.

Thursday: Bones: "The Change in the Game" (06x23) (Finale)

The unidentifiable and gruesome remains of a male bowler are found lodged in the automatic pinsetter of a bowling lane. Brennan’s father, Max Keenan, is a member of the victim’s bowling team, but currently sidelined with an injury. With no clear lead in the case, Booth and Brennan go undercover and join the very competitive bowling team in hopes of finding clues about the victim. Upon meeting the victim’s teammates, including an arrogant 12-year-old bowling prodigy, it becomes apparent there could be many suspects in the case. Meanwhile, a very pregnant Angela anticipates her labor at any moment, but continues to work diligently via webcam to identify the murder weapon from the hospital.

Thursday: The Big Bang Theory: "The Roommate Transmogrification" (04x24) (Finale)

When Bernadette receives her Ph.D., the guys take joy in reminding an emasculated Wolowitz that he is the only one in their group who isn't a doctor. Meanwhile, Koothrappali becomes Sheldon's new roommate after hearing Leonard and Priya engaging in a "Star Trek" bedroom fantasy.

Thursday: Grey's Anatomy: "Unaccompanied Minor" (07x22) (Finale)

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.

Thursday: Private Practice: "...To Change the Things I Can" (04x22) (Finale)

The doctors of Oceanside Wellness are faced with a tough decision - to point out all areas of vulnerability within the practice and risk the termination of some of their own, or to dissolve the practice and each go their separate way. Addison has a new admirer in town who offers her a very tempting proposition. Meanwhile, Charlotte is assigned to a case that hits very close to home.