Igor Drenkov (Earth-523000), Marvel Database

Igor Drenkov was a Communist spy who had infiltrated the Gamma Bomb project under the guise of fellow scientist Bruce Banner's assistant. When Bruce ordered Igor to start the Bomb's countdown, Igor spotted Rick Jones on the test site. General Thunderbolt Ross quickly went out onto the test site to take care of the youth. While Ross was gone, Igor revealed himself as a Communist spy and gassed Banner and and the other scientist and stole Banner's notes, leaving the countdown going. After the bomb

Igor Drenkov, Marvel Animated Universe Wiki

Category:Igor Drenkov (Earth-616)/Mentions, Marvel Database

Earth-523000 (General Ross Had Become the Hulk)

Igor Drenkov, Marvel Database

Bruce Banner (Earth-523000), Marvel Database

Igor Marvel Database+BreezeWiki

Igor Drenkov, Marvel Database

Igor Marvel Database+BreezeWiki

Igor Drenkov (Hulk character)

Rick Jones, Marvel Database

Igor Marvel Database+BreezeWiki

Igor Drenkov (Character) - Comic Vine

Igor Drenkov (Earth-13159), Marvel Database