[s8e20] The Time Travelers Access

While he appears to be debating his future selves (Ted from 20 hours and 20 years in the future) and Barney Stinson's future selves about whether to attend "Robots vs. Wrestlers," the episode takes a sharp emotional turn when it's revealed that the entire interaction was a figment of Ted's imagination . The Core Story

: Barney eventually snaps Ted back to reality, pointing out that everyone else—Lily, Marshall, Barney, and Robin—is busy with their own lives. Barney is planning his wedding, and the others are at home with their families. Ted is sitting alone at the bar with two tickets to a show he will ultimately attend by himself. [S8E20] The Time Travelers

The episode concludes with an a cappella performance of Billy Joel's "The Longest Time" by Ted, Barney, and their multiple imaginary future selves. While he appears to be debating his future