Ted’s best friend, Marshall, wants to propose to Lily, Ted must act quickly if he hopes to find true love, but destiny have something else in store
Ted and Robin are surprised to bump into Barney when they volunteer at a homeless refuge during Thanksgiving. Lily's nerves are tested when she goes for Thanksgiving dinner at her future in-laws' house.
It's Lily and Marshall's first Thanksgiving as a married couple and the gang are planning to spend the holiday with them. Meanwhile, Robin and Ted sleep together after arguing and then realise they don't have anything to say to each other.
After Winston graduates from the Police Academy, Nick and Coach worry about his safety, especially when they meet his petite training officer.
With Olivia's name out there as the President's mistress, both the White House, and Pope and Associates face their biggest scandal to date, and a surprise allegiance is formed in order to get things handled.