Séance of terror

Chalmers decides to attend one of Dr. Lanson's nightly seances because it's somewhere warm to rest his weary feet. A decision he regrets when a luminous cloud forms above the assembled people. Strangely, from the cloud comes a warning: someone there is about to die to prevent them from revealing secrets. A man defiantly leaps to his feet, the lights are extinguished, the man's voice is cut off and an ear-piercing shriek reverberates around the room ...