Check out a new promo of the season 5 of How I Met Your Mother which premieres Monday, Sept. 21 10:00pm ET/PT.
The tagline for the promo goes as follows: "What would happen if 'How I Met Your Mother' was a Film Noir? Would anyone live to tell the tale?"
Episode Synopsis: HOW I MET YOUR MOTHER Season 5 premiere "Definitions" - When Marshall (Jason Segel) and the gang finds out that Barney (Neil Patrick Harris) and Robin (Cobie Smulders) are hesitant to define their relationship, Lily (Alyson Hannigan) forces them to confront their biggest fear. Meanwhile, Ted (Josh Radnor) is anxious about teaching his first lecture at Columbia, on the fifth season premiere of HOW I MET YOUR MOTHER, Monday, Sept. 21 (8:00-8:30 PM, ET/PT) on the CBS Television Network.