How I Met Your MotherSeries 5 Episode 1: Definitions
Robin and Barney are puzzled as to how they should act around each other now they've confessed their true feelings. They decide to tell their friends that they're not in a relationship but continue to date on the sly. Things are going well until Ted, Marshall and Lily find out. Lily wants them to define their relationship and locks Barney and Robin into Robin's bedroom until they decide if they're together.
- Original air date