During the Dominators' subjugation of Earth, the members of their highly classified "Batch SW6" escaped captivity.Originally, Batch SW6 appeared to be a group of teenage Legionnaire clones, created from samples apparently taken just prior to Ferro Lad's death at the hands of the Sun-Eater.Later, they were revealed to be time-paradox duplicates, every bit as legitimate as their older counterparts.After Earth was destroyed in a disaster reminiscent of the destruction of Krypton over a millennium earlier, a few dozen surviving cities and their inhabitants reconstituted their world as New Earth.Brainiac 5 (Querl Dox) is a fictional character who exists in the 30th and 31st centuries of the DC Universe.
When Brainiac 1 was revealed to be an android created by the Computer Tyrants, Brainiac 5 "discovered" he was actually descended from Brainiac 2, the leader of the rebellion against the tyrants, as well as being the clone of the original Brainiac.
As time went on, Brainiac 5 began to be portrayed as unstable.
Long attracted to Supergirl, Brainiac 5 created a robot duplicate of her in his sleep, convincing himself this was the real Supergirl.
Beyond this, however, Brainiac 5's history was relatively unaffected by the Crisis, although it would be some time before he received an origin that reflected the new Brainiac 1.
Following the death of the pocket universe Superboy, Brainiac 5 is one of a number of Legionnaires who swear revenge on the Time Trapper. The Infinite Man and Time Trapper seemingly destroy each other, but Brainiac 5 quits the Legion after being accused of murdering Professor Rugarth. 3) #63 (Aug 1989), shortly before the "Five Year Gap".