Welles played his usual role of host and narrator, and also steered the  series in terms of its major direction and aesthetics.  Though Welles  and Towers drew inspiration from Scotland Yard (the Black Museum was Scotland Yard’s crime museum), and while Towers produced another  series The Secrets of Scotland Yard on that entity’s crime-fighting  exploits, the aim with The Black Museum was not historical accuracy.  Welles was out to provoke and to amaze  with gruesome details.  The format of the show was his host character  strolling through the museum, whereupon, as radiohorrorhosts.com tells  us, he would “casually pick up or point out various murder weapons and  examine them, all the while droning on about the related crime as if it  were a medical procedure.”