The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Part 2, Periodicals, 1945, New Series, Vol. 40, No. 2, p134.
Sub-Mariner [Prince Namor]; Roy Winters (introduction, death); Betty Dean; Johnson (investor); Slugger (villain, introduction); White (villain, introduction)
Synopsis
When an inventor friend of Namor's is found dead with a suicide note, Namor tracks down a businessman who forced him to write out the note and then murdered him so he could steal his new boat super-speed engine attachment design.
Captain America [Steve Rogers]; Bucky [Bucky Barnes]; Lupo (villain, introduction); three apes (villains, introduction, all die)
Synopsis
A grim Captain America and Bucky attempt to track down the nefarious Lupo and his three killer apes who have murdered eleven people during various robberies, and who has challenged the duo to catch him.
Ed Walton (editor of The Clarion); Ellen Gray; Dan Jordan (death); un-named man (villain?)
Synopsis
When the editor of a local newspaper offers $50 to any one who would spend the night at the old Tyler mansion, in which Matt Tyler had killed his wife and then himself, two men, who felt hatred for each other, volunteer with weird results.
The Whizzer [Jack Robinson]; un-named Nazi spy (villain, introduction); un-named convicts (villains, introduction for all)
Synopsis
A Nazi spy has been ordered to steal a robot bomb, and concocts a scheme to use escaped convicts to help him steal the weapon and use it to propel them to a meeting with a Nazi submarine.