What happens
Dr. John Strand enters a curio shop run by a man named Rafael, who invites him to see a chess set. Rafael sends him to Felix's shop, where Felix is killed in a struggle, and Alice Hines, Rafael's assistant, is involved. Strand and Alice go to the police, where Strand suspects the crimes are part of a deadly game Rafael is playing with people across the city. This is the Inner Sanctum Mysteries episode Death Across the Board, originally aired June 5, 1945, with Raymond Massey in the role of Strand.
A city shop, a chess-set dealer's workplace, a police station, and an emergency ward in a large city
Characters: Dr. John Strand, Rafael, Alice Hines, Felix, Chief Adams, Dr. Crandall
Listen for: Strand's explanation to the police of Rafael's chessboard scheme, and the discovery of the chess pieces left at the scenes
Written from the episode itself; it never gives away the ending. Every recording is remastered for the stream: cleaned of rumble, hiss and mains hum (and the old TV whine where we found it), then levelled in two passes to steady broadcast loudness, so one show is never quieter than the next.