Overview
Doctor Satan Strikes: Copperhead had already left the box when the delivery truck parked, substituting sacks of ore to maintain the box's weight.
Part of The Mysterious Doctor Satan Collection
Mysterious Doctor Satan: Return of the Copperhead
Mysterious Doctor Satan: Thirteen Steps
Mysterious Doctor Satan: Undersea Tomb
Mysterious Doctor Satan: The Human Bomb
Mysterious Doctor Satan: Doctor Satan's Man of Steel
Mysterious Doctor Satan: Double Cross
Mysterious Doctor Satan: The Monster Strikes
Mysterious Doctor Satan: Highway of Death