Igor Drenkov (Earth-616), Marvel Database

Igor was a Soviet spy sent to America to learn the secrets of the Bruce Banner's Gamma Bomb for future purposes of the Soviet Union. When Rick Jones drove out on the test field, Banner asked Igor to postpone the test while he got the kid to safety. Igor, hoping to be rid of Banner in order to steal his secrets, continued the test and the Gamma Bomb exploded, creating the Hulk. Later, when Bruce turned into the Hulk for the first time, he went to Banner's lab and found Igor looking for the Gamma

Crimson Dynamo - Wikipedia

Agent Trump (Earth-616), Marvel Database

Marvel DC Characters, PDF, Marvel Entertainment

Crimson Dynamo - Wikipedia

Hulk - Wikipedia

Hulk - Wikipedia

Igor Marvel Database+BreezeWiki

Igor Marvel Database+BreezeWiki

Igor Drenkov Marvel Database+BreezeWiki

Jab's Builds! (Captain Britain! Roma! Merlyn! Saturnyne!) - Page 167 - Echoes of the Multiverse