On Friday the cast and crew of NBC's Constantine were told that the production will be stopped after the initial 13 episode order that it received. But the series is not cancelled and is in strong contention for a second season.
The show has been gaining audiences since its initial airing with it being up 38% with the fifth episode that aired Friday. The problem is that unlike other freshman shows, Constantine didn't start until late October giving the network only four episodes to make a full season commitment on. So NBC will see how the show does over the last eight episodes and then make a decision about a second season.
NBC is still promoting the show and ran a marathon of the series on SyFy this weekend.
In its time slot NBC is considering running Hannibal, which is returning for a third season, or one of their mid-season shows: Allegiance, Odyssey, Aquarius, as well as miniseries The Slap.