Comments: It's a "Great Scott!" cover; DC used that as its all-purpose expression of amazement. What can we deduce from this cover about the story inside? Note the title, "The Creature from Inner Space". Does this indicate that the creature came from inside the earth? Why is the protagonist driving a boat? Did he come across the creature inside a cave on an island?
If it's burning the water, it must be losing energy, right? What powers the creature?
Decent dramatic action by Jack Kirby according to the GCD, although the cover story was by Ruben Moreira.
