Blair sets out on a mission to break up her mother and Cyrus Rose, her new man. Jenny moves in with Agnes as the two continue with their plans for their own fashion line. As Serena continues to fall for Aaron, she learns something that may derail their relationship forever while Dan interviews Bart Bass for an article for New York Magazine.

Chuck's ex-girlfriend Jill returns.

When Sheldon bans her from the apartment for numerous minor infractions, Penny decides to retaliate.

When Hank makes fun of the air conditioning at Corner Gas, he suddenly finds that the heat is on; Karen and Davis win some meat in a contest, but have trouble finding a place to keep their winnings; an abandoned pet brings out the motherly instincts in Lacey and Wanda.

John and Riley face some fatal aftermath on their trip to Mexico. Sarah and Ellison finally meet up.

In this fourth Flat is Beautiful episode, Alton shows his audience how to create a variety of crackers at home, including graham crackers.

The five remaining contestants are challenged to learn two routines, complete with lifts and solos.

Barney creates a holiday to celebrate not being a father. Meanwhile, Lily and Marshall are considering having a baby, but Lily first wants advice from Ted and Robin.

Hiro attempts to delve into Arthur Petrelli's past to uncover the mystery behind him creating a rival company Pinehearst and his hatred towards Angela. Sylar stricken by guilt tries to stop his murderous ways with HRG and Elle vying for his blood. Meredith's training goes up in smoke with the arrival of her brother.

Lucas' novel makes a comeback and does successfully. Nathan's basketball skills increases. Gigi tries to use her internship to get close to Mouth and Jamie likes Sam's rebellious attitude.

When Michael's condition begins to worsen, Sara has no choice but to take him to the emergency room. Later, Sara receives a shocking call about Michael's ailment. Meanwhile, Sucre and Lincoln find themselves in explosive territory; Agent Self makes a surprising ally; and Mahone is able to track down vital information about Scylla.

Alan tries to get away from Judith. Meanwhile, Charlie and Herb go out on the town.

In southern BC, a fundamentalist Christian sect is moving teenaged girls across the border, to serve as wives for their polygamist leaders. When a young Canadian border guard disappears, Gray and Maggie dive into the complicated, passionate and highly political world of the extreme religious sect. In the process, Gray encounters Liz Carver, a stunning American DHS agent and finds her impossible to resist.

After being given community service for her altercation with a cop, Sam tries to help out Natalie, a wayward young woman, despite pleas from her friends not to. Howard tries to give Todd advice on how to win Sam back, even though he told Howard he wasn't interested anymore.

Sam hopes he can get the Clayton's minister to perform their wedding ceremony, but as usual Sam's good intentions end with him stuck in a predicament from Hell.

Alan and Shirley engage in a heated debate on the subject of teen abortion when a young Chinese girl seeks the court's help to overturn her mother's decision. Meanwhile, Jerry defends himself after he is charged with assault for punching out a customer in a coffee shop.

Some out of town guests complain about noise in a hotel room, and a prank gone bad between Eric and Dr. Price could delay in closing the case.

Whitney and Lauren are called to New York to work on Buckler's Fashion show. Meanwhile Heidi has to deal with her new situation.

Henry awakens and finds himself in the midst of gunfire, while Edward was trying to save Raymond. He calls for help giving away his wherabouts and his identity. Mary Grady find out the truth on Tom.

More Whacked-Out Women of Reality

Ted steps back into the weird and wonderful world of dating. His journey begins when, encouraged by Louise's letter to the future, he attends a meeting of Friend Finders - a social networking group for people over 50. His first experience is bewildering and he finds himself cast as 'fresh flesh' - especially by two very different women, Helen and Marjorie. But is the newly widowed Ted ready for anything romantic?

Neliel's past is revealed through her fight with Nnoitra. Meanwhile, Pesche and Dondochakka mounts an offensive against Szayel after seeing Renji struggling against the Espada. Pesche thinks back to the time when Nnoitra attacked Neliel for power which ultimately ended with breaking Neliel's mask through the guidance of Szayel. She is dumped by Nnoitra, along with Pesche and Dondochakka back out of Aizen's palace. Neliel obtains amnesia as her broken mask renders her into a child. To the present, Nnoitra taunts Neliel in regards to their past. Neliel then releases her Zanpakuto, shouting "Declare... !".

Joseph tries to deliver Daisha's baby whilst they are stuck in the lift together. Michael has his wife replaced from the surgery team he is working with but her replacement Jamie puts a patent's life in danger.

Three mental health experts look at 10 volunteers taking part in various challenges before trying to decide which of them has a history of mental health problems.