Jim Brandon who fought crime as the Avenger was a famous biochemist who perfected two inventions that aided him in the fight against crime: the telepathic indicator allowed him to pick up random thought flashes, and the secret diffusion capsule cloaked him in the -black light of invisibility-. The only person that shares his secrets and knew that he was The Avenger, the man feared by the underworld is his beautiful assistant Fern Collier.