In a silent, secret laboratory, a tense teen-ager adjusts a complex ray-machine over the head of the most incredible living creature on the face of the Earth!
Hulk [Bruce Banner] (origin recap); Rick Jones; Betty Ross; General Thunderbolt Ross
Rick uses some of Banner's machinery to transform the Hulk, who was stuck in his monster persona, back into Bruce. Bruce is incredibly weakened by the transformation and takes a chance in using the machinery on himself again which transforms him back into the Hulk's body but with Bruce Banner's mind. Now Bruce and the Hulk can switch at will using the gamma ray machine.
It landed suddenly, unexpectedly, swooping down from the skies without warning!
Hulk [Bruce Banner]; Rick Jones; Mongu [Boris Monguski] (introduction, villain)
An alien invades Earth and claims his people will conquer the planet unless he is met in battle by the strongest opponent the world has to offer. Hulk meets the challenge but finds out it is all a ploy by the Russians to capture him and create an army of hulks of their own.