"The Goat" (Season 3, Episode 17), directed by Pamela Fryman and written by Stephen Lloyd, features Barney navigating guilt over sleeping with Robin while Ted celebrates his 30th birthday. The episode highlights the "Bro Code" and establishes a long-term narrative hook regarding a goat, with the events later revealed to occur on Ted's 31st birthday. Detailed cast information and episode plotlines are available at TMDb The Goat (2008) - (S3E17) - Cast & Crew - TMDB. The Goat | How I Met Your Mother Wiki | Fandom