Phantom Lady [Sandra Knight; also dressed as Tersa Thorn]; Senator Henry Knight; Don Borden [as Professor Braunch]; Gary Burgess; Professor Guddel (death, robot's inventor); Tersa Thorn (villain); Slim (villain); Trigger (villain); Joe (villain); Sandra Knight [also disguised as Tersa Thorn] (villain, robot)
Tersa Thorn has a robot of Sandra Knight built, and then uses it to frame the real Sandra Knight, in order to get revenge for Senator Knight sending her son to the electric chair.
Phantom Lady [Sandra Knight]; Senator Henry Knight; Gary Burgess (radio director); Professor Harper; Henry; Schatz (villain); the Nazis (villains)
A group of ex-Gestapo men steal the invention of Professor Harper that can put every radio station in the country out of commission, and they request Senator Knight go to a certain address if he is interested in discovering the reason for the radio dimout. But Phantom Lady intercepts the note and investigates herself.