Ted narrates: "And that, kids, is how I met your... wait, no. He’s not your uncle. He’s Marshall's brother. But that’s a story for another weekend. And honestly? I’m still not sure it’s real."
However, a former set decorator (let’s call her “M.L.”) shared a more intriguing detail. On the set of the final season, a running gag was to write fake character names on the background chalkboard at McLaren’s Pub. One day, as a joke on Josh Radnor, someone wrote “Brogan Peterson was here – Class of ’98.” how i met your brother brogan seth peterson exclusive