Legion of Super-Heroes Annual #1

Brainiac 5's attempt to cure Danielle Foccart results in the return of Computo, who possesses the young girl and takes over all automated functions of the Legion headquarters, resulting in many injuries to the team and widespread destruction. Danielle's brother Jacques saves the day by drinking Lyle Norg's invisibility potion, which allows him to get close enough to exorcise Computo from Danielle.