The Legion of Super-Heroes, DC

The Legion of Super-Heroes is an American comic book series, published by DC Comics, about a team of superheries from the distant future. Created in 1958 by Otto Binder and Al Plastino, the Legion appeared in DC's Adventure Comics for many years, as well as in Superboy and the Legion of Super-Heroes. The latter title became the Legion's first official series when it was renamed The Legion of Super-Heroes in 1980. Since then, the team has gone on to feature in several reboots as well as in other DC titles. Although many early stories saw the Legion travel back in time from the 31st century to 20th century Earth, later issues provided villains in their own time period to battle.

The Big Blow-Up of 2984! (Volume 2, Issue 311)
Brainiac 5 is trying to cure Danielle Foccart of a neurological disease at legion headquarters when disaster strikes-in attempting to cure her he inadvertently releases COMPUTO, a computer program with evil intent and that takes over Danielle's body. Brainiac 5 and the legion must battle COMPUTO and stop it soon as the body it is inhabiting is overloading from the stress. Jacques Foccart, Danielle's brother, saves the day by following Brainiac's instructions and swallowing an invisibility formula- becoming the second invisible kid (AKA Invisible Kid II). He manages to sedate Danielle/COMPUTO, and they place her in stasis. Brainiac 5 works to cure her, finally managing to do so while changing COMPUTOs program to erase its evil programming. Brainiac, impressed with Jacques, nominates him for Legion membership, and Invisible Kid II officially joins the team.

"Monster in a Little Girl's Mind" (Volume 2, Annual #1)
The same story as above, published as an Annual in August 1982.

Forgotten Heroes (Volume 3, Issue 32)
Saturn Girl wakes up in a strange place, dressed in strange clothes, with no idea where she is or how she got there. She finds Dream Girl, Brainiac 5, and Chameleon Boy wandering around a small agricultural community in a hypnotic trance, with no memory of who they or she is. Meanwhile, on Earth, Universo has hypnotized President Desai and, through him, has ordered the disbandment of the Legion.

Saturn Girl manages to quietly undo the mental blocks in her friends, restoring them to normal, but the four heroes are still trapped.

Forgotten Planet (Volume 3, Issue 33)
The four stranded super-heroes try to find a way to escape their prison planet, and to free the other hypnotized "farmers." On Earth, Universo has brainwashed the entire planet. Element Lad and his girlfriend Shvaughn Erin praise the "new peace" under President Desai.

Forgotten Friends (Volume 3, Issue 35)
Saturn Girl, Dream Girl, Brainiac 5, and Chameleon Boy return to Earth, and must fight the other hypnotized Super-Heroes to free Earth from Universo's control.