Suzie Plakson

Ted and Robin are surprised to run into Barney when they volunteer at a homeless shelter on Thanksgiving.

When the gang views a tape from Barney's ex-girlfriend, everyone must share their most embarrassing moment in order to get him to tell the full story about the tape.

Marshall bequeaths a "slap bet" slap to Ted and Robin; Lily's estranged father (Chris Elliott) visits for Thanksgiving.

When Ted attends his mother's wedding, he is disturbed by her overly affectionate relationship with her fiancé.

When Barney prepares a comprehensive prenup, the other guys decide to propose relationship amendments to their significant others; Quinn is furious and makes a prenup of her own.

Afraid they will never get pregnant, Lily and Marshall decide to see a specialist; Robin begins her new job.