Radio historian John Dunning described this season of The Avenger as "a poor man's version of The Shadow." Jim Brandon (alter ego of The Avenger) was a biochemist who invented a Telepathic Indicator and a Secret Diffusion Capsule, both of which helped him fight crime.

Jim Cox, in his book Radio Crime Fighters: More Than 300 Programs from the Golden Age, noted characteristics that The Avenger shared with The Shadow: having "a drop-dead gorgeous subordinate, Fern Collier, who alone knew his true identity"; being hidden by "a black light of invisibility"; and having the ability to interpret "'thought flashes' of other people." Cox added that the similarities could be explained by the facts that Walter B. Gibson was the creator of both characters and that both characters had appeared in magazines from Street & Smith Publications before their radio programs began.