Secret of Dr. Vulcan

Jeff is saved fromt he cab gas chamber by Burt and Glenda. He has gotten a clue that might lead to the identity of Vulcan. Vulcan is aware of the danger and sends Dirken to stop him. Jeff is about to find the incriminating paper when Dirken steps in and takes it away from him. A gun fight ensues during which Dirken escapes taking Burt along as prisoner. Vulcan decides to use Burt as bait to lure Jeff into a trap. The proposition is made and Jeff agrees on the rondevous set by Dr. Vulcan, who is planning an electrical trap to kill Jeff. Jeff, realizing the danger, arrives as Rocket Man ahead of the appointed time and is about to free Burt when Dr. Vulcan makes an appearance. Vulcan is now revealed as Prof. Bryant and he proceeds to back Rocket Man into the electrical trap, which erupts in a display of high voltage discharges.