Cover pencils by Jack Kirby, inks by Dick Ayers. Dr. Doom and the Sub-Mariner team up (first Marvel villian team-up and second Silver Age Sub-Mariner appearance) in "Captives of the Deadly Duo!" Part 1, script by Stan Lee, pencils by Jack Kirby, inks by Dick Ayers; Doctor Doom presents himself to Sub-Mariner and offers him an alliance against the Fantastic Four and all mankind. When Super-Menaces Unite Part 2; Dr. Doom gives a "Grabber" to Sub-Mariner and Human Torch discovers that Invisible Girl hides a photo of the Sub-Mariner in a book. Part 3 When Friends Fall Out!; The Sub-Mariner plants the "Grabber" in the Baxter Building and it is lifted into space by Doctor Doom. Part 4 Trapped!; The Baxter Building is set on a collision course with the Sun and the Sub-Mariner discovers that Doctor Doom has betrayed him. Part 5 The End... or the Beginning?; Doctor Doom is flung out into space and the Baxter Building is returned to its foundation. First mention of "unstable molecules." 36 pgs. $0.12. Cover price $0.12. Grade: CGC 4.5 explanation of grade Condition: Used (collectible)