September 18, 1938

A scientist, Professor Krammer, is tooling away in his lab when he is visited by his patron, Joe Martin. When Martin brusquely demands to know where his money has gone, Prof. Krammer shows him. The professor has built a disintegration chamber which, with the closing of a switch, can vaporize anything into nothingness. Joe Martin is a gangster and ex-bootlegger who immediately spots the potential of Krammer's machine as a murder box. What Martin does not know is that Krammer, having just made his breakthrough, wrote to his friend and old student Lamont Cranston, inviting him to visit. Little does he know, he also invited The Shadow.

Notes: Last episode of the 1938 "summer series", although in fact The Shadow had been running regularly for a full calendar year. Also, the last of 52 episodes with Orson Welles as The Shadow and the last episode with Margot Stevenson as Margo Lane.