Spy Breaker is an Australian costumed spy-hunter.
We get introduced to this fellow as a movie company, wanting to use the apparent fame of this counter-espionage hero, has elected to make a movie of his exploits. From the opening statement on that adventure, we learn quite a bit: "So far flung has the fame of Spy Breaker become that Pinnacle Picture Productions plan an epic film, featuring that great Australian as the hero ... a certain war-like power takes an interest in the production".
What did we learn? First, that Spy Breaker is extremely well known or else what sounds like a major movie studio would not have thought it such a terrific idea to devote the effort for an "epic". Second, that notoreity is not just a local phenomenum as we are told his name is "far flung". Third, he has to have been doing his spy breaking for some time to have gained the notice that he enjoys. Fourth, he must have been a major thorn to an unnamed foreign country that just the making of a movie about the fellow attracts their attention enough to justify sending some of their spies to investigate.
The fact that this nemesis of spies and saboteurs is only seen in his identity-obscuring uniform clearly shows that while he does not mind people seeing him go after these foreign evils, he does want to keep his real persona a secret - why that might be is unknown.
The costume we find him is is a red full-body suit with calf-high boots and a thin black belt around his impossibly thin waist. A skull-covering cowl and large goggles hides most of his head with just the lower front (nose, lips, and chin) discernable. In the center of his chest is drawn a large diamond-ish symbol. Completing this ensemble is a large flowing light-colored cape which hangs to mid-thigh.
Since we only have a couple of pages of Spy Breaker's adventures, there is a whole lot more about him that we do not know.
One item of considerable interest is why the storyteller found it necessary to show the producer of the movie mentioned above greeting a man named Alan Strong unless - and this is speculation based only upon years of experience in reading and watching adventures - the secret identity of Spy Breaker is in fact Alan Strong. Strong, a handsome, blond-haired, very fit man likely in his early 30s, is described as a "wealthy young squatter" (that has to be an Aussie term totally different from its American use). In an earlier non-Spy Breaker adventure, Alan Strong is described as a "world famous scientist and inventor".