Monday night’s episode of “How I Met Your Mother” on CBS featured the character Ted imagining future versions of himself while coping with being alone and deciding whether to go to a Legendary Robots vs Wrestlers fight. The episode ends with Ted admitting he would have rather gone to meet his future wife. At the close of the show, Ted and Barney (played by Josh Radnor and Neil Patrick Harris) harmonize with their future selves on a cover of Billy Joel’s “The Longest Time.” Check out their rendition below, followed by the original music video by Billy himself.