The Mighty World of Marvel #15

When the Hulk is captured in unbreakable restraints, he slips free only to return to his human form—Banner. Hearing the news, Rick Jones abandons Captain America’s side to help his friend. Meanwhile, the Chameleon, sent by the mysterious Leader to investigate a missing agent, infiltrates Gamma Base by impersonating Banner. With Talbot and Banner locked in a tense rivalry, the impostor uses Betty Ross as a hostage to steal a gamma grenade. But the Hulk, ever vigilant, is ready to stop him—before the real danger escalates.

In "Into Battle with Dr. Doom!", the brilliant but villainous Doctor Doom devises a scheme to use Spider-Man’s skills against the Fantastic Four—only to find his plans derailed when the web-slinger refuses. When Flash Thompson dons a Spider-Man costume for a prank, Doom takes the bait, capturing him and forcing the real Spider-Man to act before his friend is truly in danger.