Cover: Russ Heath

Showcase #29

Nov 1960 · DC · 0.10 USD

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In "The Last Dive of the Sea Devils!", the underwater duo faces their final mission when they join a millionaire's high-stakes scavenger hunt after losing their boat, the Sea Witch. With treasures like a life ring from the Marie Celeste and a jeweled sword in their grasp, they battle mishaps and a daring hijacking by the Black Mantas—only to rescue the sponsor and claim their prize. Written by Robert Kanigher and illustrated by Russ Heath, this 1960 adventure ends with the Sea Devils bidding farewell, inviting fans to write in for more—just in case they’re not quite done diving. Cover by Russ Heath.

Contains 3 stories

The Last Dive of the Sea Devils!

12.67 pp · Adventure

HorroUS Coast Guard crewmenVasto

In "The Last Dive of the Sea Devils!" from Showcase #29 (1960), Jo and the Sea Devils are on the Sea Witch when a UFO sighting sends them into a strange underwater confrontation with a colossal, spear-wielding "King Neptune" riding a giant seahorse. As the sunken UFO's eerie message reveals the truth behind the creature’s madness, the crew must outwit the giant before their own vessel is lost—leaving them stranded in the deep.

The Divers of Olde!

1 pp · Non-Fiction, History

Alexander the Great

Undersea Scavenger Hunt!

11.67 pp · Adventure

T.T. HartleyThe Black Mantas (dive team)

In "Undersea Scavenger Hunt!" from Showcase #29 (1960), the Sea Devils dive into a high-stakes underwater race sponsored by a millionaire, hoping to win a new boat after losing their old one, the Sea Witch. Picking up strange relics like a life ring from the Marie Celeste and a jeweled sword, they face one mishap after another—until the prize boat is stolen by the Black Mantas. With quick thinking and teamwork, the Sea Devils board the vessel, rescue the sponsor, and claim victory. At the end, they wave off the reader with a final note: this was their last dive, so if you want more, send a card to Sea Devils, National Comics!