Secrets of Scotland Yard
Here is a sample of the online episodes currently available at The Old Time Radio Fan:
Absent Minded Professor
1957-00-00 (12.24 MB) [26:44]
Bank of England Robbery
1957-00-00 (12.94 MB) [28:16]
Battalier
1957-00-00 (11.84 MB) [25:52]