Clark, Bruce and Dick are sent into the past by Dr. Nichols to discover the identity of the Man in the Iron Mask.
Cover by Win Mortimer."Three Super-Musketeers!" (Superman, Batman and Robin) written by Edmond Hamilton, penciled by Dick Sprang and inked by Stan Kaye."The Indian Fortune Teller!" (Tomahawk)"Get Your Ticket to the Treasury of Books" (public service message by Superman and Batman) written by Jack Schiff."Adventure Under the Sea" full text article by Jack Miller."The Pictures of Peril!" (Green Arrow) written by Dave Wood."Little Pete" gag strip by Henry Boltinoff.Batman: We've got to stop them from finding out who the Man in the Iron Mask is!
— Description from Comic Vine community (comicvine.gamespot.com).
