| 0 | Uncle Sam Smashes the Undersea Air Base! | cover | 1 | pencils: Lou Fine; inks: Lou Fine | Uncle Sam; Quicksilver [Max]; Merlin (inset) |
| 1 | Sabotage | comic story | 9 | script: Will Eisner; pencils: Dan Zolnerowich; inks: Dan Zolnerowich | Uncle Sam; Nazis (villains) |
| 2 | Mademoiselle Morgue | comic story | 6 | script: Toni Blum; pencils: Chuck Mazoujian; inks: Chuck Mazoujian | Sally O'Neil; Scar and his gang (first appearance; villains) |
| 3 | Dead Street | comic story | 5 | pencils: Charles Nicholas; inks: Charles Nicholas | Kid Patrol; Sir Chamberlain Bumbershoot (first appearance); Sir Chamberlain Bumbershoot's sister (first appearance) |
| 4 | The Story of Joey McGraw | comic story | 6 | pencils: George Tuska; inks: George Tuska | Kid Dixon [Danny "Kid" Dixon]; Joey McGraw (first apearance); Joey McGraw's mother (first appearance) |
| 5 | The Johnny Doring Case | comic story | 6 | script: Toni Blum; pencils: Nick Cardy; inks: Nick Cardy | Wonder Boy; Three crooks (first appearance; villains); Johnny Doring (first appearance); Mrs. Doring (first appearance); Mr. Deems (first appearance; death); Mrs. Deems (first appearance); Christy Deems (first appearance) |
| 6 | The Blades of Baron Hoff | comic story | 6 | pencils: Chuck Mazoujian; inks: Chuck Mazoujian, Lou Fine | Quicksilver; Baron Hoff (first appearance; villain) |
| 7 | The European-American Band | comic story | 5 | script: Klaus Nordling; pencils: Klaus Nordling; inks: Klaus Nordling | Pen Miller; Capt. Wrath and the European-American Band (first appearance; villains) |
| 8 | The Ape-Man Strikes | comic story | 5 | pencils: John Celardo; inks: John Celardo | Paul Bunyan; King (first appearance; an ape-man); Barnham (first appearance; villain); Joe (first appearance; villain) |
| 9 | The Dangerous Message | text story | 2 | script: Anthony Lamb | Yankee Doodle Boy |
| 10 | The Secret Nazi Air Base | comic story | 6 | pencils: Witmer Williams; inks: Witmer Williams | Prop Powers; Nazi spies (first appearance; villains; death) |
| 11 | - | comic story | 2 | script: Bill Newcombe; pencils: Bill Newcombe; inks: Bill Newcombe | Windy Breeze |
| 12 | Unboring Mr. Marlow | comic story | 7 | pencils: Dan Zolnerowich; inks: Dan Zolnerowich | Merlin the Magician [Jock Kellog]; J. D. Marlow (introduction) |