Marvel Double Feature # 4

Story 1: "Crisis at the Earth's Core"

Iron Man investigates the collapse of a house and enters the subterranean world.

Story 2: "He Who Holds the Cosmic Cube"

Cap rescues a pilot whose plane was shot out of the sky, a member of A.I.M., and tells Cap about A.I.M.'s The Cosmic Cube--who's taking it to The Red Skull! Watching via remote camera, Using an "experimental manned missile" from SHIELD, Cap catches up to The Keeper. As they battle, the hypnotized man hits the ejector switch, and the two parachute down to a remote island. Red Skull gains the advantage by telling Cap he was the one who gave the orders that resulted in Bucky's death. Gaining the Cosmic Cube, he wills The Keeper into another dimension. Cap realizes his foe has become invincible!