How I Met Your Mother
Episode Name: Lobster Crawl
Episode Overview: Robin is determined to get Barney back no matter what it takes. Meanwhile, Ted fills in as Marvin’s Nanny, leading Marshall and Lily to realize that Ted is using baby Marvin to replace his other baby, the GNB building.
Episode Number: 9
Episode Season: 8
Episode First Aired: 2012-12-03