1. G.I. Joe and two recruits sought uranium ore in the sea.
2. Greg rescued Joe when his Flying Platform was swamped.
3. When Joe went scuba diving, he attracted a deadly shark!
4. With a blow from his spear gun, Joe drove away the fish.
5. Joe and Greg found an old Spanish treasure chest...
6. ... guarded by a giant squid! It seized Greg!
7. With a small dynamite blast, Joe frightened the squid away.