| 0 | - | cover | 1 | pencils: Al McWilliams; inks: Al McWilliams | |
| 1 | Sabotage at the Belford Works | comic story | 7 | script: Frank Thomas; pencils: Frank Thomas; inks: Frank Thomas | The Owl [Nick Terry]; The Chief (first appearance; villain; death; Thor); Barbara Belford (first appearance); Mitchell Carr (first appearance; death) |
| 2 | Tarzan and the Tournament of Nimmr: Part 3 | text story | 1 | pencils: Henry Boltinoff; inks: Henry Boltinoff | Tarzan |
| 3 | Inside the Hollow Earth: Part 4 | comic story | 6 | pencils: Bob Bugg; inks: Bob Bugg | |
| 4 | Yaqui Joe the Bandit: Part 3 | comic story | 7 | script: Fred Harman; pencils: Fred Harman; inks: Fred Harman | Yaqui Joe (villain) |
| 5 | The Poisoned Headgear | comic story | 4 | script: William Treadwell; pencils: Bill Connor; inks: Bill Connor | |
| 6 | Pirate Attack | comic story | 8 | pencils: Al Micale; inks: Al Micale | A band of pirates (first appearance; villains; death) |
| 7 | The Chemical Plant Bombing | comic story | 6 | pencils: Bill Ely; inks: Bill Ely | |
| 8 | Hyster and Professor Zero | comic story | 2 | script: Ray Thompson; pencils: Charles Coll; inks: Charles Coll | |
| 9 | The Menace of Dr. Thor: Part ? | comic story | 4 | script: Frank V. Martinek; pencils: Leon A. Beroth; inks: Leon A. Beroth | Dr. Thor (villain); the Duchess (villain) |
| 10 | The Dogcatcher Duel | comic story | 4 | script: Don Black; pencils: Joe Eichberger; inks: Joe Eichberger | |
| 11 | McKee's Problem | comic story | 4 | script: Roy Crane; pencils: Roy Crane; inks: Roy Crane | |
| 12 | The Sinking of the Oran | comic story | 6 | script: Al McWilliams; pencils: Al McWilliams; inks: Al McWilliams | The Nazis (villains) |
| 13 | The Crown Jewels: Part ? | comic story | 4 | script: Norman Marsh; pencils: Norman Marsh; inks: Norman Marsh | |