William Mowse, alias Black Star, was a villain who gathered together five smalltime crooks, Falseface, the Brain, Captain Bigg, the Hopper and the Rattler, into a team, to commit crimes. He communicated with the crooks only on film. Mowse had been a minor clerk who had seized an opportunity to make it big. The crimes of his gang members brought him the means to create a black light machine that could make himself (or anything) physically big, strong and powerful. In his showdown with the Seven Soldiers of Victory, he fell in front of the machine, causing him to become so big that he fell (with the machine) through the earth and was killed.
