Just got Burns prison. ..
Congrats :) Nope, he doesn't do any damage, you just need to wait until one of your superheroes is free. You get new felons every 8 hours or so, so expect to see a few running around.
Forum Discussion
I has no superheroes free so I got Plopper and sent him to capture the first crook that got out of Burns' prison (insteda of doing the questline). It's only 3 hours anyway.
Pity Milhouse can't be a superhero (but, well, it's Milhouse).
Pity Milhouse can't be a superhero (but, well, it's Milhouse).
