First Appearance: Young Justice (2010): Season 1 Episode 17 Disordered
DeSaad is a New God who hails from the planet Apokolips. He is Darkseid's chief torturer and scientist, also acting as the link between Earth and Apokolips when transporting weapons to Intergang.
On July the 5th 2016, DeSaad was present on the surface of Apokolips when Vandal Savage arrived via a Boom Tube. He watched in silence as Savage and Darkseid shake hands and begin their business.
First Appearance: Young Justice Invasion (2012) Season 1 Episode 20: Endgame
(Season 2 if you count Young Justice Invasion as the second series... Technically is.)
Darkseid is the ruler of Apokolips and the evil New Gods. He is the Light's "partner" and supplies them with Apokoliptain technology, which he sends to Earth via Boom Tube and through his follower, DeSaad.
In 2016, after the Light's plans had been foiled by the Team. Vandal Savage conquered the Warworld and flew it to Apokolips. When he reaches Apokolips' orbit, Savage uses a Boom Tube to transport himself to the planets surface, where he meets with Darkseid, DeSaad and his other henchman G. Gordon Godfrey. He shakes Darkseid's hand and remarks that he was here to do "business as usual."
First Appearance: Young Justice (2010): Season 1 Episode 17 Disordered
