The BAU unit travels to NYC to investigate a series of murders that appears to have been committed by a vigilante conducting revenge on former criminals who have been released by the justice system.
Stewart and Lydia pretend to still be married to one another while his former receptionist visits. Oliver wants to stop dating a woman whom he finds annoying, but feels horrible because she happens to be friends with Ben.
This episode demonstrates the production processes for residential water heaters, air bags, jelly beans and ice resurfacers, and shows how each is made.
Brennan and Booth stumble upon a subterranean world of homeless people when they find the remains of a filmmaker in the ventilation shaft of an underground tunnel.
Sun comes to the realization that she might be pregnant. She struggles on whether to tell Jin about the situation. Meanwhile, with no success from Jack or Sayid, Ana-Lucia is called in by Locke to interrogate the new prisoner Henry Gale to get more information out of him about the balloon that he and his wife supposedly landed on the island with.
The town is excited when Chef returns to town after world traveling with the “Super Adventure Club,” but the boys notice something is different about Chef. It seems that Chef’s new sense of adventure has gotten the better of him and the boys try to save him.
George discovers that Max has begun an online romance with a teenage girl from Chicago. When he assumes his son's identity to protect him from what he suspects is an internet predator, George comes face to face offline with Freddie.
When Billy goes to visit his maternal grandmother and Mandy decides to have the day for herself, Grim finds himself free of the kids to do whatever he wants to do. Since Grim quickly gets bored he goes to visit General Skarr, and lets him take his magical scythe, which Skarr uses to build an army of giant lawn gnomes. Since Grim is so used to having two kids with him when they go on an adventure, he enlists Mindy and Pud'n to help him combat Skarr and retrieve his scythe. Mindy and Pud'n prove to be worthy substitutes but they are scared away by Mandy when she notices the unusual trio
A young boy witnesses the death of a museum curator but doesn't want to tell anyone about it. Danny investigates the death of an urban golfer found dead on a construction site.
Will Truman and Grace Adler are best friends living in New York, and when Grace's engagement falls apart, she moves in with Will. Together, along with their friends, they go through the trials of dating, sex, relationships and their careers, butting heads at times but ultimately supporting one another while exchanging plenty of witty banter along the way.
After Jeffrey Pope, a private military contractor, is found dead, suspicion eventually leads Green and Fontana to Robbie Howell, the younger brother of a man who died because of Pope's incompetance, and Kevin Boatman, Nick Howell's former co-worker who had witnessed the tragic events in Iraq.
Shirley defends a long-time client who doesn't want his Victorian erotica collection lost in his divorce, but she is shocked when Ivan is opposing council. Alan takes drastic steps to help Catherine's friend who is being taken advantage of in a nursing home. Meanwhile, Paul cuts back on his time at the firm when Fiona begins to take priority, causing worry among the other partners.
After Carolyn Pereira's body is dumped in an area frequented by prostitutes, Stabler and Tutuola soon realise she had far more money than a student on financial aid should have had, and learn that she was deeply involved in the worlds of online gambling and high stakes poker. Suspects include the Gloria Culhane, the roommate who ended up with the very expensive ring that Caroline stole from a star athlete, Roddy Franklin, the star athlete who had his ring taken by Caroline, and Adam Halder, Caroline's best friend from childhood who turned out to be her backup during her online gambling forays. Stabler makes a special plea for Halder, feeling like he and the young man have something in common because both were boys from the wrong side of the tracks dealing with rich kids who treated them like dirt.
Jonas attempts to rescue a group of American missionaries in hiding in Indonesia. However, he soon realizes the mission is going to take more manpower then he expected. At the base, Mac ends up being shot by Bob during a training exercise and Molly, Kim and Tiffy prepare to host a visiting senator.
As Vic prepares to help Lem get out of the country to begin a new life in Mexico; Kavanaugh and Aceveda attempt to capitalize on the situation by using this as means to try to take down the leader of the Strike Team. Dutch decides to file for a transfer. Meanwhile, Shane tries to cut off the investigation by taking extreme measures and Danny finally confronts the father of her child.
When Andy stars playing chess with Ryan on a regular basis, Jim is convinced that he is losing his best friend.
J.D. urges Cox and his fellow doctors to do special, unconventional things for their patients, but J.D. himself is not sure he can shave his head for a woman undergoing chemotherapy, after meeting a woman who loves his hair. Meanwhile,Turk and Carla attempt to eliminate all the stress in their lives, to better their chances of conceiving. Also, Elliot can't stop giving her new boyfriend Keith stupid gifts.
Cody runs for class president; Zack decides to run as well, but for the wrong reason. Mr. Moseby gets annoyed with one of the staff members.
When General Skarr tries to get rid of a weed in his otherwise perfect garden, he asks Grim to use his scythe to do the job. Billy drives a lawnmower and ruins the garden; also, the scythe's magic accidentally shoots Skarr, transforming him into a plant-like creature. Using his new plant powers, Skarr rebuilds his garden, and tries to exact revenge on Billy by throwing a party, and attacking him. Skarr gets mulched by a helicopter rotor, but he is reborn as a small weed.