Sleepwalker encounters the murderous Psyko in issue #28 and then spends the next several issues struggling with the brutal Mind Rape Psyko subjected him to. In issue #32, Sleepwalker and Spectra are both fighting and losing against Psyko, who's nearly driven them both insane. Psyko's turned them both against one another, and Sleepwalker is about to murder Spectra when she manages to remind him of who he really is. That's when Sleepwalker realizes that murdering Spectra would have driven him permanently insane, which is what Psyko wanted. Now, turning his Tranquil Fury on Psyko, he lunges at the monster and flattens him with one punch.
In the final issue of the series, Sleepwalker and Rick are trapped in the Mindscape in Cobweb's lair. Rick has been Mind Raped by Cobweb to the point that he thinks he's dead, but when he sees that his body hasn't decayed he realizes that Cobweb's lying and manages to free himself and Sleepwalker. Sleepwalker, having by now been banished from his home and framed as a mass murderer by Cobweb, is filled with Unstoppable Rage and charges at Cobweb in a rage. He throws Cobweb's minions aside like they were nothing, and when he catches Cobweb he takes back the Imaginator Cobweb stole from him and uses it to banish the demon once and for all.