Watch How I Met Your Mother Season 1 Episode 20 online via TV Fanatic with over 8 options to watch the How I Met Your Mother S1E20 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, Hulu Plus, Amazon Prime, and Verizon On Demand.
|YouTube Purchase||Watch Now|
|Google Play||Watch Now|
|Hulu Plus||Watch Now|
|Amazon Prime||Watch Now|
Lily and Robin go to a high school prom in order to listen to the band that they want to play Lily's wedding.