After sharing a kiss at the beginning of the summer, Robin and Barney are unsure how to handle their mutual attraction. After some consideration they tell the gang they have decided to remain just friends, but secretly continue seeing each other. They are able to get away with their secret romance for a couple months, but are discovered when Ted, Marshall and Lily walk in on them together. They explain to the gang that they are happy with their casual relationship, and didn't want to complicate it by defining it. This is unacceptable to Lily, who pressures them to label their situation, and ultimately locks them in Robin's room to force them to address it. Meanwhile, Ted is anxious about his first days as a professor at Columbia, which is made worse when he shows up at the wrong class and starts his lecture.
Season 5 Episode 1 of How I Met Your Mother resulted in a 0.00 rating in the 18-49 demographic.
Ted is a single, 27-year-old architect living with his two best friends from his college years; Marshall Eriksen, a law student, and Lily Aldrin, a kindergarten teacher and aspiring artist. Lily and Marshall have been dating for almost nine years when Marshall finally proposes.
Their engagement causes Ted to think about marriage and finding his soul mate, much to the disgust of his self-appointed best friend Barney Stinson, whom he met in the restroom at a bar four years earlier. Barney is a serial womanizer who concocts elaborate con games, usually involving costumes and fake identities, designed to bed women, only to lose interest in them immediately afterward.
Ted begins his search for his perfect soul mate and meets an ambitious young reporter from Canada, Robin Scherbatsky, with whom he quickly falls in love. He's sure it's love at first sight, but destiny may have something else in store.
The series is narrated through flashbacks from the future.