The Burning Beekeeper
Lily asks for her father's help when she and Marshall decide to throw a housewarming party. Marshall's boss gets under Ted's skin and the two nearly come to blows, and Barney puts the moves on a wacky divorcée.
P.S. I Love You
Barney uncovers the lost episode of Robin’s “Underneath the Tunes” as Robin Sparkles. Meanwhile, Marshall and Lily are concerned that Ted’s new girlfriend is a stalker.
Dave Returns
While trying to get an endorsement from the Chief of Police, Leslie and Ben awkwardly run into Leslie's old flame, Dave. Meanwhile, Andy and the rest of the office work on a theme song for Leslie's campaign.
The Bubble
Everyone in the office is unhappy when Chris decides to make some big changes in the parks department — especially Tom who starts to question his career choices. Leslie is caught off guard when Ben has a meeting with her mom.
Sweetums
The Parks Department forms a partnership with a local company to sell energy bars at the parks in Pawnee, but Leslie tries to stop the deal when she discovers how unhealthy the snacks are. Mark reluctantly agrees to help Tom move out of his house.
Heart Broken
Claire and Phil’s Valentine’s Day romp ends with Claire in the hospital. Jay and Gloria’s attempts at romance face constant interruption. After hosting a wild party, Cam and Mitch are left with hangovers and a new housemate.
Aunt Mommy
Phil and Claire go overboard with drinks, and divulging personal information, on a night out to celebrate the sale of a house to Mitchell and Cameron's friends.
Princess Party
The guest list for Lily's princess-themed birthday party gets a little out of hand when Mitchell decides to invite his mom, much to Claire's dismay, and disinvite Fizbo, much to Cameron's dismay. Things get even more strange when DeDe shows up with Claire's old high school boyfriend in tow, and Jay and Gloria each turn to their own unique methods of dealing with this gathering of misfits.
My Funky Valentine
Phil and Claire break from their traditional Valentine's Day dinner date and plan a little "role play" excursion. Meanwhile, Jay and Gloria's ideas of romance clash when he takes her to a comedy show, and Mitchell and Cameron play cupid for Manny.
The Benefactor Factor
A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.