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.
Horatio delves into Delko's past to find the killer who targets the motel Delko is staying at.
With the Russians launching a nuclear strike on London, the only person who can help the team in this desperate hour is the traitor amongst them. With the Russians hunting them down, the team ushers their traitor through London in a desperate bid to reach the codes, and the bomb, in time.
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.
A body is found at a cash point, the apparent victim of a heart attack. Two teenage girls are arrested for the brutal murder of a cab driver. The girls confess to the crime, showing no remorse. Two open and shut cases. At first these two incidents seem to have nothing in common, but as Wallander delves deeper into the mystery of why the girls murdered the cab driver, he begins to unravel a plot much more involved complicated than he initially suspected. The two cases become one, and lead to a conspiracy that stretches beyond the borders of Sweden.
Uncle Gabby gives Drinky Crow a hernia, and feels guilt for the first time in his life, so he orders an immense Monkey God from the internet.
Ty asks Amy to give their relationship another chance. Ashley makes a decision that surprises her mother and Lou. Cattle rustlers hit Big River Ranch, and the situation gets out of hand.