In a tweet by @SyfyPR, it was announced that their upcoming show Defiance will premiere on Monday, April 15 at 9:00 PM ET/PT. The series is being produced in collaboration with Trion Worlds who are producing a Defiance Massively Multi-player Online video game.
Defiance is being developed for television by Rockne S. O'Bannon and stars Grant Bowler who will be playing Jeb Nolan, the local cop in a refuge camp with the same name as the show. The series revolves around an alien war with earth's human inhabitant that leaves the planet dangerous to both the alien and human races.
Monday night may not be the best slot to put the show, but given all the buzz about it, it will probably be moved to a different day/time slot depending on how well it fares with its viewing audience.