Watch The Flash Teaser in Arrow Season 2 Episode 23 trailer

Following the series order and first poster last week, The CW has given fans their first brief glimpse at The Flash spin-off, in a trailer for the Season 2 finale for Arrow. Make sure to stay tuned after the finale, "Unthinkable", airing on Wednesday, May 14 at 8 PM ET, for your first real look at The Flash, but in the meantime, take a look at this sneak peek.