Things go badly when Abbi attempts to extort money from someone when she learns their dark secret.
Michael hopes to have a drama-free day to say his goodbyes. Deangelo and Andy try to make sure Michael's clients don't leave Dunder Mifflin as well.
The office holds a garage sale in the warehouse, where Dwight challenges himself to see what he can get by trading, starting with a thumbtack. Michael decides to ask Holly to marry him.moreless
Todd is ready to stop being a travelling salesman and wants to take a desk job in Scranton. Andy deals with a glitchy computer and Pam's hesitance to get him a new one.moreless
Michael screens his finally completed Threat Level Midnight for the Dunder Mifflin staff.
The staff grows increasingly uncomfortable with Michael and Holly's PDAs. Jim and Pam regret a champagne Valentine's luncheon. Erin invites Andy to help on a romantic treasure hunt Gabe arranged for her.
An emergency with CeCe forces Jim to abandon Michael at a gas station—without his phone or wallet—and Holly, Erin, and Dwight scour Scranton to find him. Gabe becomes offended when submissions to caption Pam's latest work of art insult Sabre.moreless
Andy hopes to make some sales by hosting a business seminar, and one attendee makes Jim very uncomfortable. Michael tries to get a dejected Holly back into the improv spirit. Erin's frustrated at her inability to beat Gabe at Scrabble.moreless
Michael awaits news of how Holly's ultimatum to A.J. demanding a proposal was received. Pam gets the office to share their resolutions.
Holly returns to fill in during Toby's jury duty, so Michael makes Pam throw a second office Christmas party to coincide with her return. Jim accepts Dwight's challenge to a snowball fight. Darryl anticipates Christmas with his daughter.moreless
Holly discovers the vandalism to her Woody doll. The snowball fight between Jim and Dwight continues. Oscar's certain Angela's new boyfriend is gay. Pam tries to make the party fun for Darryl's daughter.moreless
A cold sore leads to Michael contacting all his old girlfriends telling them he has herpes. Meanwhile, Andy hosts a sex ed forum for the staff.
At the Dunder Mifflin company picnic, Michael and Holly are reunited for the first time since their split and put on a show the attendees won't soon forget. The branches compete in a volleyball tournament.moreless
Michael helps Holly move following her transfer to Nashua, NH. Meanwhile, Pam discovers people at corporate are less enthused about Halloween than she, and Dwight agitates Andrew by applying to Cornell.
Following a burglary at Dunder Mifflin on the night of his third date with Holly, Michael organizes an auction to replace what was stolen. Pam has a job at corporate to help with finances. Dwight seeks Phyllis' help to win Angela back.moreless
Dwight helps Michael prepare for the birth of Jan's baby, but when she shows up and already has the baby, Michael doesn't know what to do. Michael vows to feign dislike for Holly to appease Jan. Pam and Jim have trouble communicating while she's at art school. Dwight tests the invincibility of Jan's stroller after finding out how much it costs.moreless