The avatar of the black hole, that trapped Dylan after the Nietzschean ambush, returns to get him back.
Monk gets stuck in a traffic jam and finds that the cause of the standstill is murder.
Vanessa's new boyfriend is 18 years old, and has a child by a former girlfriend; Bernie confronts Vanessa about her new boyfriend and gets under her skin about it; Bernie reveals to Wanda that he thinks Vanessa is having sex.
Dr. Weaver meets her birth mother, but their relationship changes when Kerry reveals she is gay. Dr. Carter causes a commotion when he confronts a couple hoping to scam some painkillers.
On their way to Pacifidlog Town, the boat Ash and his friends are riding breaks down, forcing them to make a pit stop on Donto Island. It is currently the Donphan mating season, which they end up being separated from each other. May now has to make the ultimate decision: stay to find Max and miss the final contest before the Grand Festival, or leave alone for Pacifidlog Island trusting that Ash will find Max and come to the Contest for the next morning.
The Nan Zhao kingdom is brainwashed by the chief of a moon-worshiping cult who forces the King to sentence his Queen (Sun Li) to death, claiming that she is a demon.
After postal worker Rosie Diaz goes missing during what seemed to be a regular workday, the team initially connects her disappearance to her cargo, which include $12,000 worth of the game Demon Storm, which all the kids were after. But when the team gets in touch with child protective services, they learn that Rosie recently had her foster children taken away after an anonymous abuse call. A search of her home uncovers a DVD containing child pornography, and the team starts to look at the case from another angle. Danny comments on Martin and Sam's obvious closeness, and wonders why they're keeping it quiet.
It's Valentines Day 2005 in O.C. when Sandy and Kirsten's conflict about Rebecca continues. Ryan tries to make peace with Caleb to spend Valentines Day with Lindsay. While Seth, Zach, and Summer head to San Diego in hope to make their Comic Book idea succeed Seth has a breakdown and ends up in a lonely state. Marissa and Alex take a step forward in their relationship while Julie returns from her trip in hope to reconnect with Marissa.
Grissom, Sofia, Sara and Greg investigate the disappearance of a woman coming home from a night out with a friend, her abandoned car found on the edge of a highway. Catherine, Warrick and Nick investigate the deaths of a hunter and his prey, a Kodiak bear.
Given the challenge of creating a 30-second commerical for Dove Cool Moisture Body Wash, the teams excel at coming up with concepts but struggle with executing the focuses of their commercials.
Joey accidentally makes a date with a reporter from "People" for Valentine's Day. He has the gang "accidentally" bump into him and his date at the restaurant to ruin the mood, but his plans backfire when she thinks he's taking their relationship to the next level. A drunken Alex shares some sexual secrets with Gina. After Joey sends Michael over to hit on a table of girls, Michael actually becomes "one of the girls."
When the Heffernans begin working out with the Ferrigno's, Doug secretly makes a pact with Lou so he can sit around instead of working out.
The Nan Zhao kingdom is brainwashed by the chief of a moon-worshiping cult who forces the King to sentence his Queen (Sun Li) to death, claiming that she is a demon.
Grimmer stubbornly stalks Petrov for his experimental research papers chronicaling the abuses at Kinderheim 511, but he gets a surprise instead.
Valentine's Day starts badly when the Iranian air force shoots down a British airliner, killing 100 passengers. The U.K. Prime Minister threatens to retaliate by bombing nuclear reactor sites, which could doom future support for political reformers in Iran. But C.J. has made an agreement with Abbey to allow the President to get more rest, and she is reluctant to awaken him at 5 A.M. to deal with the crisis. Meanwhile, Toby and a visiting law professor answer questions from a foreign delegation that is trying to write a new constitution for the former Soviet Republic of Belarus, and harried staffers pass the buck of Leo's traditional meeting with the new Miss World.
The body of a young contortionist is found folded into a box on Coney Island, leading Mac and Stella to the circus where they find themselves embroiled in a real-life Romeo and Juliet story between the dead contortionist, Lukas, and a trapeze artist, Anasuya. Danny and Flack find a woman's body in a laundry chute and learn that she was actually the former sorority sister of the woman who lived in that building, and turn their suspicion to the abusive husband the woman was hiding from.
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.
A conservative talk show host involved in a sexual harassment scandal is murdered, but the trail leads to the victim's wife and an obsessed stalker.