When does Supergirl return?

Supergirl is a costumed superheroine who is Superman's cousin and one of the last surviving Kryptonians from the planet Krypton. It is based on the DC Comics character of the same name, created by Otto Binder and Al Plastino. The series was officially picked up on May 6, 2015, after receiving a series commitment in September 2014 and received a full season order on November 30, 2015.