1. Mr. Keen, Tracer of Lost Persons 1949 The Silver Dagger Murder Case

    Mr. Keen, Tracer of Lost Persons 1949 The Silver Dagger Murder Case

    49
  2. Mr. Keen, Tracer of Lost Persons 1950 The Case of the Murdered Detective

    Mr. Keen, Tracer of Lost Persons 1950 The Case of the Murdered Detective

    34
  3. Dangerous Assignment 50/05/10 (ep019) Lecturing Professors

    Dangerous Assignment 50/05/10 (ep019) Lecturing Professors

    22
  4. Mr. Keen, Tracer of Lost Persons 1945-The Case of the Absent Minded Professor

    Mr. Keen, Tracer of Lost Persons 1945-The Case of the Absent Minded Professor

    35
  5. Dangerous Assignment 50/03/20 (ep013) International Blackmail

    Dangerous Assignment 50/03/20 (ep013) International Blackmail

    24