Amy and Ricky are now engaged, but Amy starts to consider what marriage may really mean.

Maria Menounos & Derek Hough, Jack Wagner & Anna Trebunskaya, Donald Driver & Peta Murgatroyd, Gavin DeGraw & Karina Smirnoff, Roshon Fegan & Chelsie Hightower, Sherri Shepherd & Val Chmerkovskiy, Melissa Gilbert & Maksim Chmerkovskiy, William Levy & Cheryl Burke, Martina Navratilova & Tony Dovolani, Katherine Jenkins & Mark Ballas, Gladys Knight & Tristian MacManus, and Jaleel White & Kym Johnson get to dance again as they tackle the Jive or the Quick Step

Rebecca and Doc are closer to finding the man who might be the key to finding the secrets behind the returning criminals. A discovery beneath Alcatraz brings Hauser closer to the truth.

In the battle phase two singers of the same team will sing the same song in front of studio audience. Their coaches will decide, with whom they will continue the voice competition.

Mordecai and Rigby compete in a video-game contest in hopes of winning a new game controller.

Amaar reveals to Baber that he plans to be the Imam of the new Mosque. In turn, Baber revolts and forms a splinter Mosque. Meanwhile, Ann is distraught over Charles' upcoming nuptials to a younger woman and comes up with a bizarre strategy to fight for her man. And Sarah attempts to rejoin the church choir, with fiery results.

Sally tries to fix a life that she ruined, Suren and Aidan look forward to their future together and Josh must choose between Nora and Julia.

Information surfaces and lives are at risk as Rebecca continues her dogged pursuit of Tommy Madsen.

The queens campaign and debate as they vie to become the 2012 Wig Party candidate. Sex-advice columnist Dan Savage and Absolut vodka spokesman Jeffrey Moran are the guest judges.

Can Gerry score his first win of the basketball season? Robert plans a principal's 25th anniversary celebration for an uncooperative Callaghan.

When a bomb explodes at a protest rally killing five people, Castle & Beckett realize the key to solving the case is to reconstruct the 47 seconds prior to the explosion. Using video and witness accounts, they uncover the shocking truth about who planted the bomb.

As the team deals with the fallout of the workshop, Eileen is forced to deal with her estranged husband as her daughter pays a surprise visit. While, Derek asks Karen to help him steal the show away from Tom and Julia.

Shaquille O'Neal

Kristin Chenoweth, Liam Hemsworth, Moshe Kasher

Dr. David Page

Rachel Maddow, Timothy Olyphant, Train

Elizabeth Banks, Carson Daly, Jake Owen

The battle between Ichigo and Ginjo comes to a close when the latter receives a mortal wound. Just as Ginjo is about to die, Tsukishima tries to kill Ichigo but is stopped by Riruka. Tsukishima is later rescued by Shishigawara while the surviving Xcution members decide to separate. Ichigo later returns to Soul Society and requests that Head Captain Yamamoto let Ginjo's body be buried within the human world as the last thing he can do for him. Yamamoto agrees just as Ichigo accepts to continue being a Substitue Soul Reaper. Rukia see Ichigo off, recalling their time together and silently thanks him. Ichigo smiles and tells Rukia "See ya later" before returning to Karakura Town where he is greeted by his friends and family.

Michael is struggling to accept that Alex is the clinical lead on AAU, made all the more difficult because she is taking all the interesting cases. When a repatriated patient comes in from The Gambia, Michael refuses to be shut out, but his diagnosis and Alex's are completely different. As the patient declines, will the two consultants be able to work together to save her life?

The series takes the look at the work of scientists attempting to understand why the world's weather seems to be getting more extreme and if these patterns are what is to come in the future.