Ted and Stella get engaged, but Ted soon learns that he doesn't know anything about her. Meanwhile, Barney confesses to Lily that he's in love with Robin.
Season 4 Episode 1 of How I Met Your Mother resulted in a 0.00 rating in the 18-49 demographic.
s04e01 - Do I Know You?
s04e02 - The Best Burger in New York
s04e03 - I Heart NJ
s04e04 - Intervention
s04e05 - Shelter Island
s04e06 - Happily Ever After
s04e07 - Not a Father's Day
s04e08 - Woooo!
s04e09 - The Naked Man
s04e10 - The Fight
s04e11 - Little Minnesota
s04e12 - Benefits
s04e13 - Three Days of Snow
s04e14 - The Possimpible
s04e15 - The Stinsons
s04e16 - Sorry, Bro
s04e17 - The Front Porch
s04e18 - Old King Clancy
s04e19 - Murtaugh
s04e20 - Mosbius Designs
s04e21 - The Three Days Rule
s04e22 - Right Place Right Time
s04e23 - As Fast as She Can
s04e24 - The Leap
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.