Ted (to prove he's not a milquetoast) and Barney (to impress Robin) pick a fight with a group of guys sitting in the gang's favorite booth at MacLaren's.
Terminators come after a family whose unborn daughter plays an important role in the war against the Machines, and Sarah, Cameron, and Derek try to protect them.
The entire Upper East Side of Manhattan is rocked when Bart Bass dies suddenly in a limo accident. Serena and Eric take the news very calmly while Lily has a troubling time despite her mother, Cece's, awkward attempts to comfort her. Chuck begins to blame Lily for his father's death and threatens to reveal a secret that Bart found on her before his accident. Meanwhile, Blair's mother, Eleanor, prepares for her latest marriage to Aaron's father Cyrus.
Michael, whose condition is deteriorating, winds up in the hands of The Company who promise Lincoln that they can save Michael's life in exchange for a favor. Elsewhere, Gretchen and Self wind up with Scylla and a buyer.
Financial problems may force Crane Poole & Schmidt to be put up for sale in the series finale, which also finds Alan petitioning the Supreme Court for Denny's access to a non-FDA approved medicine, and Shirley and Carl planning their wedding.
Financial problems may force Crane, Poole & Schmidt to be put up for sale. Meanwhile, Alan petitions the Supreme Court for Denny's access to a non-FDA approved medicine; and Shirley and Carl plan their wedding.
Leonard asks Penny for advice when his new relationship starts moving too fast.
Mel tries to prove she doesn't need help from Angela when she considers renting the apartment above Sam and Mel, to be closer when the baby comes.
As we descend beneath our modern day cities, we are met with ancient and hidden secrets. Journey with us back through history and rediscover cities of the underworld.
In order to stop Arthur, Hiro and Clair team up and travel back in time to when Kaito gave Claire to H.R.G. Meanwhile, Peter and the Haitian head out to stop Arthur, but are stopped by Sylar and Suresh has a breakthrough with the formula.
The Chief tries to help a boy who has aged rapidly. Meanwhile, Blake tries to help people via the healing power of laughter.
When Cat breaks up with Owen, Lola decides to be supportive and break up with her own boyfriend, Glenn, by telling him that she has brain cancer.
Things get tense after Cat sneezed on Lola. Meanwhile, Briggs tries to get Glen back on the police force.
Another doctor tries to use Blake's method: the healing power of laughter.
The Chief calls a staff meeting to discuss Lola's nonexistent brain tumor.
When Jeff and Carolyn decided to buy their first house together, it was a big deal for the self described procrastinator and his long-time girlfriend. When a small character home caught Jeff's eye, she knew they had to move fast. Excited about making their new house a home, they made big plans to overhaul the entire house. But eight years later, they've still got some major issues. To help this conflicted couple are designer Jillian and realtor Todd. Jillian and her team will try to turn this '30s bungalow into a comfortable new living and entertaining space, while Todd tries to sell them a new home that suits an active life style. Stuck with a tiny house that is sabotaging their social life, Carolyn and Jeff will have to decide: will they love their home again or will they list it?
In NYC, Whitney has an interview with Diane von Furstenberg and sees Jay. Plus, Lauren says goodbye to her Laguna home and Stephanie makes a difficult decision about Cameron.
The gang members are thrown in jail after the police find evidence linking them to the Baron's murder, and rumors begin to spread of a traitor in their midst. However, they soon face a more immediate problem when they are confronted by a vengeful inmate.