As Election Day nears, Patrick insists on taking his relationship with Carmelita public; Ellen's brother, Chase, demands to know the truth about his sister's death; Nick and Lisa go to couples therapy; Brian Jr. goes missing.
Christine and Barb prepare for a casual, non-relationship-seeking double date with two guys they meet at a video store, but jealousy arises when only one of them gets asked out for a second date.
The boys take on the challenge of building a car that will beat traffic by rising up -- and driving over it. And as an added bonus, the lift allows the vehicle to find parking like nothing else on wheels. The key to this build is a set of amazing wheels that can move in all directions without actually turning.
Ferrari expert and master car restorer Wayne Carini gets a lead on a 1972 Ferrari Daytona Spyder for sale in Denver. Abandoned in a shed in the early '80s, the car has been painted an awful lime green and hasn't been driven for 27 years. It seems like a disaster, but Wayne has a hunch that he knows who the original owner is. With just 48 hours to put together a deal, Wayne and a friend hop aboard a private Gulfstream 450 in the middle of a blizzard and fly to Denver with the hopes of buying this rare Ferrari.
A baby with AIDS has Benson and Stabler asking for assistance from Warner as they investigate the case. They are pointed in the direction of a homeopathic doctor who has an questionable ethical past and who had prescribed the baby ineffective vitamins.
With Lucas back within MI5 he reveals that the Russians interrogated him about Operation Sugar Horse, the most secret ongoing spy operation MI5 ever had. If the Russians know about it, then MI5 has a very high level mole. Harry seeks out his mentor, The Spycatcher, to help him find the mole. Ben is undercover with an Al-Qaeda cell; they are planning to bomb London and what looks like a dry run unexpectedly turns live.
Gibbs and his team are searching for a cyber serial killer who takes videos of his victims. The team quickly finds out that the videos of the dead victims are false.
The Suttons say goodbye to Johnny, and Charles pops the question.
Mike teams up with the boys from Bartos Bait & Fish to catch leeches that will later be sold for fish bait. Then it's off to the Green Tripe factory in Hollister, CA where Mike helps make BARF (Biologically Appropriate Raw Food) for dogs.
While Eli takes on a lead paint manufacturing case that may take him to the Supreme Court, Jordan is forced to defend his sanity in court. Meanwhile, Eli discovers his father's diary that contains a disturbing revelation.
After recuperating from her health scare, Adrianna returns and tries to make amends with Naomi, but her ex-BFF refuses to forgive her for the betrayal. Adrianna makes a surprising connection with Navid, who helps her through her situation. Meanwhile, Annie and Ethan finally take their rapidly growing romance to a new level during the school's homecoming dance, causing Naomi to feel jealous.
Alien pods are discovered in an abandoned garage; a retirement-home resident has a deadly gift; a patient wishes to be reattached to his formerly conjoined twin; a power-company employee confronts a scientist who is stealing power to create the ultimate weapon.
Casey is in panic mode after the diary that details her unsettling romantic dreams about Truman goes missing. Believing that Derek and Edwin took it, Lizzie and Marti attempt to get the diary back by making their stepbrothers' lives miserable.
Vic closes in on Shane, Mara and their sick young son; Claudette dismantles the Strike Team; Pezuela offers Acevada "assistance" for his mayoral campaign; Rita Denton (Frances Fisher) comes on to Dutch; and Billings' ex-wife and daughter are fearful when a registered sex offender moves into their neighborhood.
An ailing man suffers from blackouts and sleepwalks, leading the team to wonder if his sleepwalking is a symptom, or how the man is becoming exposed to something else. When the man's daughter grows ill as well, the team must provide a diagnosis before both die. Meanwhile, Cuddy adopts a newborn but when the birth mother displays a rash, she has to make a decision between putting the mother or daughter at risk.
When a girl is found covered in blood and holding the murder weapon that killed her best friend, she becomes an obvious suspect, though she can't remember anything. But Jane, believing she's innocent, engineers a risky maneuver in which she must relive the terrifying events in order to spark her memory.
The team must shift their attention from a case they are working on and hand it over to Martin, after a child is reported to have been kidnapped at a mall.
Efficiency expert Emmett Milbarge pays the Buy More a visit to inspect the branch, while a global terrorist looks for Jeff. Chuck needs to socialize with Jeff to find out about his connection to the terrorist. Finally, it all comes down to video games and the prevention of World War III.
Jenny has a new young model friend, named Agnes, who encourages Jenny to explore her wild side, and also to confront Eleanor Waldorf who is planning to steal Jenny's designs in order to pass them off as her own. Meanwhile, Serena and Dan attend Rufus' latest art opening as friends, but then Serena meets an artist, named Aaron Rose, and the evening gets a little uncomfortable for Dan. Elsewhere, Blair attempts to seduce Chuck, but he proves to be tougher than she ever imagined. Also, Jenny begins to have a mutual feelings with Nate as he's staying with her, Dan, and Rufus while searching for a place to live.