Jack Johnstone, AKA Mr. Sinister Jr. is the son of Mr. Sinister. Years after his father's demise he arrives in Steelport and begins a killing spree.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.