Arrow’s Stephen Amell guest stars as an older Oliver Queen in the February 25 episode of DC’s Legends of Tomorrow, and The CW has released the official synopsis for the episode.

“Star City 2046” — (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV)

THE TEAM ENCOUNTERS A VERY DIFFERENT OLIVER QUEEN – When a malfunction sends the Waverider crashing into 2046 Star City, our heroes face a startling version of their own future where they never stop Savage (guest star Casper Crump) and never return home. The city is in ruins and overrun by criminals, which thrills Rory (Dominic Purcell). Sara (Caity Lotz) is despondent over the destruction of her home and stunned when she learns what happened to her old friend, Oliver Queen (guest star Stephen Amell). Steve Shill directed the episode written by Marc Guggenheim & Ray Utarnachitt (L106).

Original airdate 2/25/16.