Ep. 10: Hound, Watson, and Mrs. Hudson investigate sabotage of England's new Air Mail service to Europe.
Aired on January 22, 1985

A mysterious individual is actively undermining the newly established Air Mail postal service connecting England to Europe. In response to these disruptions, Hound, Watson, and Mrs. Hudson take on the responsibility of uncovering the identity of the saboteur. The trio must navigate the challenges posed by these deliberate interferences to restore order to the vital communication route. Their investigation focuses on identifying the person responsible for the sabotage, ensuring the service can operate securely and efficiently without further hindrance from external threats.
Episodes
- Ep. 6 · A mysterious green balloon arrives at Hound's home with a distress message.
- Ep. 7 · Moriarty's theft of a gold statue leads to a chase at the docks
- Ep. 8 · A young woman returns to England from America and discovers her uncle has changed significantly.
- Ep. 9 · Royal Navy requests Hound and Watson to recover a submarine stolen by Professor Moriarty
- Ep. 10 · Hound, Watson, and Mrs. Hudson investigate sabotage of England's new Air Mail service to Europe.
- Ep. 11 · Sherlock Hound and Watson investigate the missing twenty Sovereign Gold Coins
- Ep. 12 · Hound shadows a cash carriage after police sabotage prevents escort
- Ep. 13 · Hound investigates the mysterious disappearance of a freight car on a train to London
- Ep. 14 · Hound and Watson pursue Moriarty for stolen diamond coral lobster carvings