| 0 | Wolves of the Yukon | cover | 1 | pencils: Dan Zolnerowich; inks: Dan Zolnerowich | Frosty North; British Agent X-7 |
| 1 | - | comic story | 6 | script: Ted Torrence; pencils: Ray Burley; inks: Ray Burley | Chip Collins; Anton the Barber (villain, introduction); other spies (villains, introductions) |
| 2 | - | comic story | 5 | pencils: George Aksut; inks: George Aksut | Shark Brodie; Nazis (Villain) |
| 3 | - | comic story | 8 | pencils: Alex Blum, Eisner/Iger Shop; inks: Alex Blum, Eisner/Iger Shop; colors: Eisner/Iger Shop | The Spy Fighter; Three 'living planet' monsters (villains, introductions, deaths); Martians (introduction, death) |
| 4 | The True Life Story of Stanley Ketchel "The Michigan Mauler" | comic story | 4 | | Stanley Ketchel; Honey Bill Mellody; Joe Thomas; Philadelphia Jack O'Brien |
| 5 | - | comic story | 6 | script: Hugh Bartlett | Oran; A race of Amazons (Villains, Introductions) |
| 6 | Keeping Fit | text article | 2 | pencils: ? (1 panel art); inks: ? (1 panel art); letters: typeset | |
| 7 | - | comic story | 4 | script: Chuck Walker | Kayo Kirby; Nat Slide (Villain, Introduction); Looey Califa (Villain, Introduction) |
| 8 | - | comic story | 7 | pencils: Steve Broder; inks: Steve Broder | Kinks Mason |
| 9 | Wolves of the Yukon | comic story | 5 | script: Franchot Renaud; pencils: Nick Cardy; inks: Nick Cardy | Frosty North (Introduction); British Agent X-7 (as Thelma Schmitt); Herr Struck (Villain, Introduction) |
| 10 | - | comic story | 5 | pencils: Witmer Williams; inks: Witmer Williams | Rip Regan the Power-Man; Two dictators (Villains, Introductions) |
| 11 | - | comic story | 5 | script: Klaus Nordling; pencils: Klaus Nordling; inks: Klaus Nordling | "Strut" Warren; The Nazis (Villains) |
| 12 | - | comic story | 2 | script: Fist E. Cuffs; pencils: Fist E. Cuffs; inks: Fist E. Cuffs | Slug-Nutty Sam |
| 13 | Fight Facts of the Air | comic story | 1 | | |
| 14 | - | comic story | 4 | script: ? [as Dennis Colebrook] (credited) | Spencer Steel; Mike McCarthy; Stupe McGoo (Villain, Introduction); Pretty Hanlon (Villain, Introduction); his gang (Villains, Introductions); The Weasel (Introduction, Death) |