By this time, Beast has rigged up a machine that will probe the Professor's mind and allow a projection of the Professor's head tell them the thoughts that are on his mind. Doing so, the Professor can only say that he needs to find the Hulk before it's too late. Not wishing to harm the Professor with the device, they turn it off and have Marvel Girl probe the Professor's mind further to try and learn more, but all they can gleam is that the Hulk has some key to the Professor’s recovery. Cyclops realizes that it's probably the Hulk's alter ego, Bruce Banner, whom the Professor is referring too and the group decides to seek out the Hulk to try and get Banner's aid in saving the Professor's life.

While Cyclops, Marvel Girl, Angel and Beast go out to find the Hulk, Havok and Lorna decide to stay behind and watch the Professor, with the jealous Iceman also deciding to stay behind to keep an eye on Havok. The X-Men track down the Hulk who is currently on a rampage in Las Vegas. The X-Men engage the Hulk but Cyclops, Angel and Beast's attacks on the jade giant prove ineffective. It's not until Jean unleashes a mental bolt on the Hulk that they have any effect on his rampage. The strain of the mental attack causes the Hulk to revert into Bruce Banner. Before the X-Men can get any answers out of Banner, Glenn Talbot arrives with the military and demands that the X-Men step aside and allow him to take Banner into custody. When Cyclops tries to explain that they need Banner's help to save the Professor Xavier's life, the awakening Banner recalls that he has a Gamma-Ray powered device that can cure mental exhaustion and that the device is in one of his hidden desert labs.

However, unwilling to help out the X-Men, Talbot orders his troops forward and their advancement excites Bruce enough to cause him to transform into the Hulk once more. The Hulk then makes short work of a tank before jumping off to escape so that he can be alone. The X-Men and the military both split up to attack the Hulk. The X-Men's ship proves to be faster and they track the Hulk out into the Nevada desert. There they battle the monster, and in the wake of the battle the Hulk inadvertently uncovers the hidden lab that his alter-ego was talking about.
Sending Angel in to recover the device, the other X-Men hold off the Hulk. The Hulk manages to overpower them, almost sending Cyclops and Marvel Girl for a nasty fall when he smashes the group open. They are saved by Beast and the group manages to make their escape. Returning to the X-Mansion, they are reunited with Havok, Lorna and Iceman for the moment of truth. Activating the device, the X-Men are pleasantly surprised to find it worked when the Professor awakens, completely cured of his affliction. With the crisis over, the Professor thanks his students for saving his life.

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