When does Supergirl return?

Supergirl is an American superhero drama television series that aired on CBS and later The CW from October 26, 2015, to November 9, 2021. Based on the DC Comics character created by Otto Binder and Al Plastino, the series follows Kara Zor-El (played by Melissa Benoist), Superman's cousin, and one of the last surviving Kryptonians from the planet Krypton. The series was retroactively incorporated into the Arrowverse beginning with its second season, and became definitively linked with the franchise in the fifth season.