The dogged detectives of Scotland Yard are on the case in three old time radio mysteries. First, Orson Welles narrates the story of "The Car Tire" and its brush with murder from The Black Museum. Then, an artificial pearl holds the solution to a murder in "The Case of Marjorie Tate" from Whitehall 1212 (originally aired on NBC on May 11, 1952). Finally, Ben Wright plays Inspector Peter Black in "Pursuit of the Woman in Gray" from Pursuit (AFRS rebroadcast from February 26, 1952).