A work event in a ballpark skybox leads Carrie, Doug and his buddies out to the game - but when an important client finds fault with Doug, Spence has to step in as the devoted husband. At Arthur's dinner party, guest Bernard, turns the table against him.
Red kryptonite causes Krypto's tail to detach from his body.
Sam and Alex confront Clover about slacking off during their missions. After losing track of Clover on their next mission, they find she has single-handedly defeated the villain. Suddenly, Clover is acting differently. Her spy skills keep getting better and better. When Sam and Alex investigate, they find out that Geraldine, head of rival agency S.P.I., has secretly modified Clover into a super agent so she can recruit her. In the climax, it's Sam and Alex versus the super agent Clover to try and get their best friend back. In a b-story, Clover's busy social life is interrupted when she becomes a super agent.
When Tom comes to town to participate in a senior fencing match and Big Jimmy has also shown up to help the Hughes with their house, Big Jimmy throws his hat into the ring and challenges Tom to a duel.
Fontana and his temporary partner, Det. Nick Falco, must tread lightly when they discover links between a powerful police commissioner and the murders of an infamous porn actress and a maverick publisher.
Sydney and Vaughn tell Jack about Sloane's alleged involvement in Vaughn's search for his father and Irina's contract on Sydney's life. After cornering Sloane, they both conclude that someone is framing him. The APO team set a trap to catch the fake A. Sloane, but they fail. Once they realize what "Arvin Clone" is after, Sloane suggests he should step down temporarily. However, Sydney reluctantly convinces him to stay on the case, since he may the only person able to anticipate "Arvin Clone's" next move. But Nadia fears that this pursuit may revive her father's past obsession – Rambaldi.
Keith gets violent with Dan after learning that Dan paid Jules to fall in love with Keith. Anna turns Felix in to the school authorities after learning that he was the one who vandalized Peyton's locker. Lucas and Brooke discuss Brooke's possible move. Meanwhile, Nathan chances Haley in the hope of bringing her home. Brooke decides to move in with Karen.
The team's plan to con an auction house with a comic book forgery goes awry when corrupt copper, Sam Phillips (played by Fay Ripley), decides she wants in on the play.
Catwoman's cat, Isis, steals a cursed gem that causes Ace to run into a string of bad luck.
While helping her classmate Mandy search for her missing Jack Russell terrier, Veronica stumbles onto a bigger mystery, which affects pets all over Neptune. Meanwhile, tensions mount in the Echolls family as Trina tries to convince the now-retired Aaron to take a part in her new boyfriend's independent movie. Later, Weevil is arrested for breaking into the Kane residence and taking something from Lilly's room.
House and his team battle to diagnose a pregnant patient's life-threatening illness, prompting her to make the most emotional decision of her life, and Vogler is determined to fire House.
Luke helps turn an old house into a museum. Lorelai says too much during an interview about the inn. Rory, Paris and Lane have boyfriend trouble.
Vic and Monica stake a deal with the DEA to shut down Mitchell's tar heroin operation. When the bust comes up empty, Vic's suspicions of Shane grow, until Shane proves himself by coming up with a key piece of evidence that reveals a large stash of tar being stored at a local church. Meanwhile, Dutch and Claudette's friendship continues to feel strain as they try to tie a young woman's murder to a suspected serial killer. Plus, Julien takes a stand against Monica's policy, then goes to David for support when she suggests he consider transferring out of Farmington.
Turk won't open up at couples therapy. Elliot refuses Dr. Cox's romantic advice, when a very attractive man saunters into the hospital. J.D. learns a lesson in humanity from a dying old woman. The Janitor accidently lets a bunch of rats run around Sacred Heart.
The office staff play a basketball game against the warehouse workers in which Jim shows off to impress Pam and upstage her fiancee who is on the opposing team.
Jim, certain he will win the annual hot dog eating contest, is humiliated when instead he loses to a petit woman (Suzy Nakamura), and his problems are further compounded when Andy decides to date the female champion.
Streaky programs Dogbot to help Krypto so he can have more time with Kevin.
After Amy spends an hour chatting with Ray while he is trying to watch the basketball game, he tells Robert that she talks to much, which of course, Robert repeats to Amy, leading to a confrontation between Ray and "Lady Chatterly."
Curtis brings in a suspect who has critical information about Marwan's next strike. Michelle orders Curtis to use harsh methods to interrogate the suspect, but things get complicated when Marwan sends a lawyer to defend his rights. Logan's advisors begin to worry as he continues to exhibit fear in the face of the ongoing terrorist threat.
On the morning of his Julliard audition in New York, Ephram makes plans to meet up with Madison (guest star Sarah Lancaster) for coffee where he finds out that she was pregnant with his child. This devastating revelation causes Ephram to make decisions that will alter the course of his life. Amy tries to figure out what this will do to her and Emphram's relationship. Meanwhile, Dr. Abbott counsels a man (guest star Chris Penn) whose son may die as a result of a hunting accident.