Mr. Scarlet [Brian Butler]; Pinky; Miss Wade (Butler's sectretary); The Black Sphinx [Powers] (villain, introduction, museum guard)
Synopsis
The Black Sphinx, whose men have succeeded in stealing rare gems from a local museum, decides that Mr. Scarlet and Brian Butler both need to be put out of the way, so the villain hides the Thotep Ruby in Brian's room in an attempt to cast suspicion on him.