The Diplomat’s Premiere, Supergirl And More To Watch On TV Tonight!

The Diplomat -- 8 p.m. EST on HBO

This documentary profiles former U.S. Ambassador Richard Holbrooke, with appearances from Bill Clinton, Hillary Clinton and John Kerry!

Supergirl -- 8 p.m. EST on CBS

Kara begins her crime-fighting career with a hunt for an escaped criminal!

Gotham -- 8 p.m. EST on Fox

Butch and Penguin collaborate on a new mission.

Legends -- 10 p.m. EST on TNT

During the show’s Season 2 premiere, Martin continues to hide out as he searches for answers to his true identity!

Blindspot -- 10 p.m EST on NBC

The team must take down a new threat in a pretty uninviting location!