In the recent episode of Supergirl on CBS, an alien hacker known as Indigo battles Supergirl while attempting to nuke National City. Supergirl has managed to entirely foil her. Plus, she has been then destroyed via malware, courtesey of her friend from CatCo now working at the DOD. However, in the end, as Supergirl learns Alex has murdered Astra not Hank himself whose aliased Martian Manhunter, Non sets up pieces of Indigo to do his vile bidding as well as that of Starro (Ben Kingsley).
Lauren Vandenvoort (V/Smallville) portrays the infamous Indigo. Supergirl soars resumably into HDTV screens on CBS Mondays at 8pm.