Stories from the set

The opening song titled "Hey Beautiful" is performed by the band "The Solids," which was founded by the series creators Thomas Craig and Carter Bays.

The Bro Code, which Barney mentions so often throughout the series, was published by Simon & Schuster in 2008.

The prototype for MacLaren's, the main characters' favorite bar, is a real bar in New York called McGee's. In the series, the bar is named after Carter Bays's assistant, Carl MacLaren, and the bartender in the series is also named Carl.

In Marshall and Ted's apartment, as in the famous film Pulp Fiction, the clock always shows 4:20.

The TV host named Sandy (Alexis Denisof), who worked with Robin, is the real-life husband of the actress who plays Lily.

At the beginning of the series, no one knows where Barney works or what he does. This is a reference to the series «Friends» (1994-2004), where no one knew what Chandler did for a living.

The actor who played Scooter (David Burtka), Lily's ex-boyfriend, is the real-life husband of Neil Patrick Harris.

Season 3, Episode 14. When Barney recalls the girls he seduced and dumped, Madeleine Albright can be spotted in the photos.

Throughout episode 13 of season 6, numbers appear in descending order starting from 50 and ending at 1.