Russia presses the White House, while Jack must try to thwart the Chinese and his oldest antagonist simultaneously.
It's still Marshall and Lily's big wedding day but now we're at the reception. Robin tries to tell a story but keeps getting interrupted. Barney tries his hardest to figure out Ted and Robin's secret.
Poised to become a member of Congress and maybe more, Nathan considers the cost to those he loves, along with his mother's advice and Linderman's prophecy. As he prepares to face Sylar to the death, Hiro learns of his lineage from his father. While various "heroes" fatefully arrive in New York City, Peter and Claire attempt to leave the city before the foretold explosion. H.R.G.
Evelyn's boyfriend, Teddy, invites Alan and Charlie to go with him to Las Vegas on his private jet. The boys confront their individual 'daddy issues'
Doug and Carrie's marital tension continues, as they ponder whether they have a future together. Arthur and Ava's wedding day turns problematic.
At Arthur's wedding reception, Doug and Carrie's marital tension continues, and they ponder whether they have a future together.
Tommy and Jimmy have two different ideas on how to save the Donnellys. Tommy hatches a plan to get the family, along with Jenny and Joanie, out of town.
Alex's double life is finally bringing in the cash she wants but hiding everything from everyone is taking a toll on her schoolwork and her connection with Paige. But making money is the only way she and her mother won't get evicted - Alex tries to convince herself she's making the right decision. When Sean and Emma are not talking, she will have to go through her scariest experience yet all by herself. Marco also learns that sometimes love is very, very messy.
When Brian's dog finds a body, it prompts two people to confess to murder. It turns out that the body is over 600 years old, so Sandra, Jack, Brian and Gerry must discover why the pair took responsibility for a crime they couldn't possibly have committed and if they are the perpetrators of other killings. Elsewhere, Strickland is rather keen for them to solve an even more tricky mystery that is closer to home.
Kevin acts as McCallister's attorney when a radio host makes accusations against his war heroism. Also, Tommy and Julia must face a tough decision regarding their newborn babies.
A girl's parents retain Peter to sue Cambridge University because she has not been offered a place. Peter visits his old tutor to investigate and learns that Simon contacted him for money shortly before he disappeared. Gloria is upset because it is a year since her husband died, and her son is picked up by the police for breaking windows in the town. Lyle assists Snell in a scheme to stop the gas company building on a piece of local grazing land. Beatrice uses Lyle to win back Alan, but on discovering that Alan has again been cheating on his sister Peter confronts him.
Nancy turns to her mother for help when the stress of home life and unresolved feelings for Redcorn cause her hair to fall out.
The Warden requests the inmates wear bunny costumes as uniforms, but the Twins order some wolf costumes as well and make all Hell breaks lose when they start acting like the animals they are dressed as.
Eric and Vince are determined to get "Medellin" off the ground, but the rights to the script stand in their way. Feeling tense the day of the "Five Towns" premiere, Drama seeks relief at a massage parlor, but can't avoid Daily Variety. At the auto-body shop, Turtle meets a girl who shares his love for limited-edition sneakers, but her overbearing father hampers his game.
The Simpsons' pooch, Santa's Little Helper, becomes a police dog.
While Tom tries to save his marriage, Mike and Susan get engaged. However, Susan's happiness is short-lived when she realizes Gabrielle has stolen her cancelled wedding with Ian. Meanwhile, Edie wants Carlos to move in with her, and she's ready to do anything to make it happen.
The Soprano and Lupertazzi crime families quarrel over asbestos removal. Tony deals with a problematic associate. Paulie suffers a devastating personal loss. A.J. questions his friendship with Jasons Parisi and Gervasi.
England's population is suffering, both from a lack of food and from a lethal plague called 'The Sweats'. As a result, King Henry feels depressed and not his usual, confident self. He starts having doubts about the future and his ability to rule the country. Fortunately for him, a change is coming up.
Dangle accepts a wedding proposition from his ex-wife's husband, but before he ties the knot, Wiegel gives an even bigger surprise than she planned.
Lois runs for mayor of Quahog, though she doesn't become the front-runner until she dumbs down her political views. Once in office, she becomes corrupted with the power that she now holds, and begins accepting bribes so that she can buy herself expensive things. Meanwhile, Peter comes to enjoy being the "first lady" of Quahog, and all of the perks that go along with it.