In a flashback episode, the gang ponders the future of the Ted, Robin and Barney love triangle. Meanwhile, Barney accepts a series of challenges from Lily and Robin.
When Robin and Loretta's conflict escalates, Barney is caught in the middle. Meanwhile, Marshall and Daphne deal with a stowaway on their road trip, and Ted and Cassie try to enjoy a trip to a lighthouse.
When Daphne sends a troubling text message to Lily, Marshall enlists the gang’s help to remove the message while enforcing the “No Questions Asked” rule.
When Ted finds himself with three prospects to be his date for the wedding weekend, he chooses poorly. Meanwhile, Barney and Robin have a confrontation with their minister, and Marshall learns more about his driving companion, Daphne.
When Barney is forced to pick sides in a fight between Robin and his mother, Lily coaches him on how not to ruin his relationship. Meanwhile, Ted and Marshall get into a dispute over wedding gifts and thank-you notes.
While Barney works through his anger at Ted after finding out he still has feelings for Robin, Marshall Skypes in to act as a judge and help settle their dispute. Meanwhile, Lily realizes she is Robin’s only girlfriend.
When Lily discovers Ted’s list of things he wants to do in New York before he moves for Chicago, she becomes frustrated that she is the only person who knows about his plans. Meanwhile, Robin and Barney realize they have very little time together before their relatives arrive for their wedding.
Marshall sees something online that changes the course of his journey east, while Lily confronts Ted about letting go of Robin.
On their way to Long Island for their wedding weekend, Robin and Barney come across a startling family discovery.
Throw away the Playbook for good! In the series' hilarious final season, you're invited to Barney and Robin's epic wedding weekend, and we get to know Ted's -- wait for it -- "The One!"
The Season 8 finale is set just before Robin and Barney's wedding, with Ted taking Lily to see the house he's been fixing up, and Robin and Barney settling in for a treasured night of relaxation that is rudely interrupted by an obnoxious couple. Meanwhile, Marshall and the baby take a last-minute trip to see his family in Minnesota.
Robin is desperate to find her “something old” she buried in Central Park years earlier for the wedding. Meanwhile, Marshall and Lily ask for Ted’s help packing for Italy, and Barney bonds with Robin, Sr.
The gang works together to plan a legendary bachelor party for Barney.
When The Captain asks Lily to move to Rome for a year to be his art consultant, she fears that Marshall will resent her. Meanwhile, Ted and Barney become obsessed with a girl who is hiding her amazing body under a puffy coat.
Future versions of Ted and Barney try to convince Ted to go see Robots Versus Wrestlers. Meanwhile, Marshall challenges Robin to a dance-off.
After Robin asks Barney to sell his bachelor pad so they can build a home together, Barney is reluctant and drives away potential buyers. Meanwhile, Lily’s commitment to her job as The Captain’s art consultant strains her relationship with Marshall.
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