Why Isn't 'Arrow' On Tonight? CW Superhero Crossover Event Causes Schedule Changes

If you were looking forward to a new episode of "Arrow" tonight, then this news might be a bit disappointing. The hit CW series will not be airing tonight because the network switched around its broadcast schedule this week, and its latest new episode aired this past Monday night instead. The reason for this change was to accommodate the four-show crossover event, "Crisis on Earth-X," with "Supergirl," "Arrow," "The Flash" and "DC's Legends of Tomorrow." With the "Arrow" part of the crossover airing on Monday night after "Supergirl," it allowed for the event to take place over two nights instead of three, and also prevented the flow from breaking up due to the usual Wednesday block of superhero-less programming. The scheduling for "Arrow" will go back to normal next week, just in time for its Season 6 midseason finale.