When the gang sees Mitch at a putt putt course, they laugh it up at his pathetic job until they accidentally hit him in the head with a golf ball. Feeling sorry for him, Eric invites him to join the gang in the basement. But it snowballs from there when Mitch obsesses over Donna. Meanwhile, Pam doesn't see what the big deal is about rejecting Bob's offer to move in together, since she is dating another man.
Marissa plots to ruin her mother's happiness by inviting someone from her mother's past to the wedding shower, while Sandy attempts to hide Theresa's return to the O.C. from Ryan. When Ryan discovers Sandy's lies and Theresa's reasons for coming back, he puts himself in a dangerous situation. In the meantime, Seth's unimpressive first meeting with Summer's father leaves their relationship in doubt.
When Chloe accidentally inhales a mysterious krypto-gas, she discovers it acts as a truth serum to anyone who comes in contact with her and decides to take advantage of her new power by going to the Kents to find out Clark's secret. However, her new power comes with fatal consequences and Clark must find an antidote before she discovers the truth about him or worse, dies.
While dissension among Xindi ranks festers, Enterprise tries to recover from a devastating attack.
All the children of South Park are attracted to Mr. Jefferson, his son and their home filled with games, toys and animals. Cartman goes out of his way to get Mr. Jefferson to love him while the local police force resent him for being black and wealthy and decide bring him down.
Jack reluctantly works with Kim on an undercover job that may help them gain an advantage over Saunders. Palmer informs his cabinet of the crisis, while Saunders makes yet another demand. Chase tracks down the man who left the hotel and learns that the virus is spreading to the general public.
Nick 's future at the firm is in question because of because of a lawyer Burton thinks quite highly of but he doesn't feel she is ready to be a partner in the firm just yet. Sandra however blames Nick for not being voted into the firm. Sandra files a sexual discrimination lawsuit against Nick and his firm causing Jake to hold an executive meeting to consider what action to take against Nick. Burton is worried about his son 's future at the firm.
Jason and Richard are sued. Rory is upset by a decision Dean has made. Dean is told to stop spending time with Rory.
Vic and the Strike Team decide to take risky measures to protect themselves from being linked to the Money Train heist. Unfortunately, their plan is interrupted when one of Vic's open cases is suddenly linked to a Narco Corrido song.
Lucas must make a difficult decision regarding Brooke. Haley considers having sex with Nathan.
Courting unnerves Frasier, whose wooing of a winsome matchmaker is constantly interrupted by her disarming beau, a dedicated environmentalist who's also quite cosmopolitan.
When it becomes obvious that a forensics expert raped and murdered a student, the investigation focuses on a criminology professor Cragen arrested decades earlier for similar crimes, but is the professor a perpetrator or a victim?
A man's gunshot-induced amnesia causes Jones and Medavoy to concoct an unconventional way to nail his assailant. Meanwhile, a man Sipowicz put away twenty years ago for raping and murdering a 12-year-old girl goes free after DNA testing exonerates him, and Ortiz and Ronson bust a gruesome underground network pre-teen prostitution ring.
Ozzy grows increasingly frustrated about being cooped up around the house. He misses Sharon, who is busy working on her show, and is upset about the weight he has been gaining because he cannot work out. He also hates the bulky neck brace that he is forced to wear. Jack gets another tattoo and reveals it to Ozzy. Ozzy is so bored that he goes out grocery shopping with his assistant, Tony, even though he hates to shop. He later joins Jack at the shooting range. Ozzy is soon able to begin using the treadmill again, and receives the good news that he can take off the neck brace.
J.D. hooks up with Danni again, after Sean returns, but he can't forget about his passionate night with Elliot. Meanwhile, Dr. Cox realizes, that he might actually have a crush on the one doctor he loathes.
Cate banishes C.J. and grounds Bridget for going to C.J.'s college keg party. Jim has to take a written drivers exam after being pulled over with an expired license.
Amy confides to Bright that she may have developed feelings for Ephram and sees him in a new light, but Bright begs her to have mercy on poor Ephram, who is still nursing a broken heart from his recent break-up with Madison. Meanwhile, Linda reveals her HIV status to Delia after the girl confronts her about all the pills she's been taking. While Delia takes the news better than expected, the rest of the town goes ballistic after Linda's secret unintentionally becomes public knowledge. Dr. Abbott faces a potential malpractice suit, and Andy is forced to come clean with Ephram, who doesn't take the news very well.
A police officer collapses and dies after pulling over a car, and the investigation reveals he was murdered. Horatio grows suspicious when Internal Affairs gets involved in the case, leading him to believe that the killing wasn't a random crime. Meanwhile, Calleigh aids an abused woman who is living with one of the suspects in the probe. Yelina begins dating Horatio's nemesis – who is heading up the Internal Affairs inquiry.
While the Andromeda is confronted by the Commonwealth fleet and Tri-Jema, Dylan must decide whether or not he can entrust the Route of Ages to them.
Falling in love with a new temporary Montecito employee known only as "Bob the floater" (guest star Christian Kane), Nessa begins pressing her new mystery man for more personal details. However, when she discovers that her new beau is actually suffering from amnesia and walked into the hotel several days again hoping to jar his memory, Nessa turns to Ed in the hopes of uncovering the truth about Bob. Meanwhile, a guest's discovery of a revealing picture of her undressing in a hotel cabana on the internet, sends Danny on the hunt for a peeping camera man whose lens has also captured a revealing side of Delinda. Sam's war of words with a world-champion eater prompts her to enter an eating contest, enlisting Mike as her trainer.