As "Nathan" starts displaying new powers, he has visions of an incident from his past involving a young girl and decides to investigate. Hiro tries to save a co-worker and learns a truth about himself. Tracy tries to regain her old life and job.

When a controversial African politician falls ill, he is brought to Princeton Plainsboro for treatment. The team struggles with whether to help a merciless dictator being subpoenaed for crimes against humanity in his country. Meanwhile, Wilson tries to make peace with a feuding neighbor, but House's prying exacerbates the problem.

When Robin fears that Barney is cheating on her, she soon discovers that he is spending his evenings with Ted learning everything there is to know on how to date her.

Nathan's fear comes true when the scandal becomes public. Haley talks with Quinn about her estranged husband David. A fashion show brings a responsibility for someone, in an unexpected way, while another makes a decision that could cost him his career.

Lizzie finds an unhappy surprise when she assists a needy boy, and Charles is determined to find his father.

The third week of performances has begun. In the Latin Night the pairs have to dance either to Samba or to Rumba.

Amaar invites Reverend Thorne to co-host an upcoming party but Thorne's meddling threatens to turn the event into a disaster.

Billie's pregnancy begins to make her more attractive and Zack takes notice of her new curves. However, when Billie has an incident involving self-tanning lotion, Zack is turned off by her appearance.

Alan cares for Judith's child and his ex-mother-in-law. A photo Charlie would rather be kept private provides Jake with a chance to blackmail him.

It's Founders Weekend at the ZBZ House and Casey uses the opportunity to scrap for donations from the alums while Rusty tries to keep Jordan from dropping out of school.

During the first day of school at Constance Billard, Jenny takes her place as the new Queen Bee. However, Blair gets in her way. Lily returns home to find that things are not as they were when she left them with Rufus. At NYU, Olivia Burke, an actress, enrolls and is assigned to be Vanessa's roommate.

Zoe has the Lightman Group look into a college athlete accused of rape. Meanwhile, Foster and Loker head to a religious compound in order to determine whether or not it is actually a cult.

The team is sent to the scene of a major accident in which a car lost control and crashed through a street fair. Meanwhile, Nancy gets a new partner and Rabbit teaches Marisa a valuable lesson.

Howard takes Raj along to check out the Goth dating scene. Sheldon uses chocolate as part of a behavior modification experiment on Penny.

Three volleyball players mysteriously drop dead on the court while Calleigh's testimony against Delko threatens his future as a CSI.

It's fashion week and Castle and Beckett get to see what happens in the background as they investigate the murder of a model.

Jamie Foxx, Joe Torre

Sarah Vowell

Arne Duncan

Steve Martin, Lea Michelle

Ellen Page, Kevin Nealon, Dierks Bentley

Mayuri experiments on Gegetsuburi, and discovers that the zanpakuto only return to their owners' control if they are defeated by their owners. Momo and Rangiku send their zanpakutos back to the 4th division barracks, but the cart carrying them is attacked by an unknown assailant. Ichigo meets with Momo and Rangiku, then reaches Muramasa, who is having difficult using his abilities in his current body. Ichigo fights Senbonzakura, and gains the upper hand before Byakuya arrives. Byakuya reveals that he has joined Muramasa as part of following his internal desire to protect his pride, then attacks Ichigo.

A hitman from India arrives in the UK with the intend to kill a ten month year old baby who is the heir to a large fortune. Mercer and the team have to work to protect the child and stop a mob war from breaking out. Symmonds attempts to destroy the team which leads to repercussions.

Sam invites her brother, Jamie to stay for the weekend. Jamie ends up in Don's bed following a heavy drinking session. When Don decides to find out if he is gay he asks Jamie to go to a gay bar with him.

Rita accidentally tells Kip that Hallie plans to go to a concert with a new coworker. Meanwhile, Patti, who son just left for college, is spending too much time with Jay for his liking.