T.O. Morrow

T.O. Morrow was the creator of Red Tornado.

Testing Red Tornado
Dr. Morrow was present at the fight between Supergirl and his robot, which Supergirl won, though she damaged the robot so badly that he went rogue. Morrow was fired because of this by Sam Lane.

Attacking Sam Lane
Morrow then targeted Sam Lane for having ordered the destruction of his robot (who was according to him his life), though the army failed. Maxwell Lord managed to find out that Morrow was controlling Red Tornado, and informed Alex Danvers of the situation.

Final Stand
Danvers then invaded Morrow's safehouse, where she confronted him at gunpoint. Morrow then attacked her, while Red Tornado fought Danvers' sister. Supergirl was being beaten badly, but Alex managed to grab her pistol, and shot Morrow dead.