Issue: #173
Last valuation update: 2025-10-01
Hulk becomes a stowaway on Ralph Robert’s ship on a mission to test an H-bomb. The Cobalt Man reveals himself to the X-Men.While stowing away on a ship that turns out to be going to a dangerous H-bomb testing area, Bruce Banner finds himself in battle with the industrial thief Cobalt Man!
Creators: Roy Thomas, Herb Trimpe, Petra Goldberg, Jean Izzo
Characters: Hulk, Thunderbolt Ross, Betty Ross, Ted Roberts, Cobalt Man, Colonel John D Armbuster