- TODAY! THE BIG LOWDOWN ON THE "UNDERGROUND" (original print media ad - all caps)
- The World's Secret Battlefront!
- THRILL after THRILL after THRILL! IT TELLS THE WHOLE HEROIC STORY! (Print Ad-Kentucky New Era, ((Hopkinsville, Ky.)) 1 December 1941)
- REVEALED ON THE SCREEN!....THE WORLD'S SECRET BATTLE-FRONT! GET SET FOR REAL EXCITEMENT 1000 Thrills Await You (Print Ad- Berkeley Daily Gazette,((Berkeley, Calif.)) 15 October 1941)
- 1000 THRILLS AWAIT YOU! UNDERGROUND World's Secret Battlefront! (Print Ad-Little Falls Herald, ((Little Falls, NJ)) 3 July 1941)
- YOU WOULDN'T BELIEVE IT POSSIBLE...IF YOU DIDN'T KNOW THAT IT'S TRUE! (Print Ad-The Pilot, ((Southern Pines, NC)) 27 June 1941)
- SEE THE GESTAPO TAKE IT FOR THE 1st TIME! (Print Ad- Brooklyn Eagle, ((Brooklyn, NY)) 31 July 1941)
- NO. 1 EXCITEMENT-HIT FOR 1941! Underground THRILL AFTER THRILL AFTER THRILL! IT TELLS THE WHOLE HEROIC STORY! (Print Ad-Indianapolis Times, ((Indianapolis, Ind.)) 4 September 1941)
- It would be the most exciting screen story of the season...even if it weren't true! (Print Ad-Tacoma Times, ((Tacoma, Wash.)) 2 October 1941)
Contribute to this page
Suggest an edit or add missing content