SYFY has updated their official Youtube channel with a new trailer for Krypton. The latest trailer features a look at the setting of the film and previews some of the characters. For those who are unaware, Krypton will be set two generations before the destruction of planet Krypton.  The series will feature Kal El’s grandfather as he struggles to redeem his family’s honor and save the planet. Krypton will premiere on SYFY on March 21.