Muscle Man, Rigby and Starla are annoyed about Mordecai's awkward goodbye to Margaret so they try to get Mordecai to tell Margaret how he feels about her.
When Brennan is shot while working late at the Jeffersonian lab, she is rushed to the hospital in critical condition. While at the hospital, she struggles with visions of her mother that defy her usual logic. Meanwhile all evidence suggests that Brennan's attacker may be linked to the Jeffersonian.
The queens connect with their inner child as they star in a fun-filled kids TV show.
Castle & Beckett get an up-close-and-personal view of a "Real Housewives"-esque reality TV series, "The Wives of Wall Street," when they investigate the murder of the show's rising young star. Meanwhile, Castle's attempt to give Beckett a Valentine's Day gift goes horribly wrong.
Jeff and Audrey ask Russell to list the women he has slept with so they can avoid giving one of those names to their baby. Meanwhile, Adam is humiliated when he spends a lot of money on a new bicycle and gear.
After learning about a new service that lets people stay in touch with the deceased, a lonely, grieving Martha reconnects with her late lover.
Liam tries to pit Josh and Nora against Aidan; Sally gets closer with Max; Kenny suspects that Aidan may be a vampire.
Harry helps Billy’s moms, Zoey and Michelle, to encourage Billy to be cooler at school. Meanwhile Jonathan and Janet fear their daughter Anastasia may be failing French, and administer an I.Q. test to Harry, fearing she got the ‘dumb gene’ from him. Harry and Rose square off about the future of Rose’s potential child.
Carl says his goodbyes; Frank is on babysitting duty; Sheila wants to introduce Jody to toy time.
Bart's dream girl, Mary Spuckler, comes to town, but his failure to pay her enough attention is having a negative impact on their relationship. Meanwhile, Homer once again runs afoul of Marge and lands in the doghouse.
Scott discovers that Spartan has a broken leg and Amy is forced to make the toughest decision of her life.
Matt Damon (as himself) hires the firm to find a charity to enhance his image, but Marty soon realizes he may have to dig deeper than expected in order to keep the actor as a client. Meanwhile, Jeannie finds time to spend with Roscoe; and Tessa grills Monica about their status.
Roger announces that Max Jets, a character who showers the Smith family with money, is making a return; a gold-digging waitress romances Max and threatens the family's inheritance.
Jake's worst fears are realized upon discovery that Leslie has gone missing while working her dangerous undercover assignment, and now he's determined to find her at all costs. Meanwhile, an unlikely and suspicious client enlists Des's PI services.
When a heart-shaped pancake simply doesn't cut it, the kids convince Bob to let them skip school in order to help him find a Valentine's Day gift that will "wow" Linda. Meanwhile, in the spirit of the romantic holiday, Linda sets up a speed-dating event at the restaurant that doesn't go exactly as planned.
The Humping Robot attacks the U.S. Navy in Battlehump; an intervention for M.A.D. Cat; imagine how the Thundercats learn about estrus.
On Valentine's Day, Meg goes on a date with a guy she met online, and Lois and Peter stay in bed all day; Brian is visited by his ex-girlfriends.
Cora brings the giant to Storybrooke, where he unleashes vengeance on the town; Emma and Henry go with Mr. Gold to search for his son; Greg asks Belle what she saw on the night of his accident; Anton the Giant befriends humans.