Ep. 21: A new thief targets the Queen's favorite horse in London
Aired on April 9, 1985

A new criminal operating in London has emerged, described as surpassing Moriarty in skill. This individual's next objective is identified as the Queen's favorite horse. The narrative focuses on this specific threat to the royal animal, highlighting the unique nature of the thief who challenges established reputations within the city.
Episodes
- Ep. 17 · Investigation into the River Thames Monster Attacks and Missing Passenger
- Ep. 18 · Hound searches for three missing French art students in London while Lestrade investigates stolen reproductions
- Ep. 19 · The Rosetta Stone floats away from the British Museum prompting Hound's investigation
- Ep. 20 · Moriarty's gang steals gold while Lestrade hinders their escape from London
- Ep. 21 · A new thief targets the Queen's favorite horse in London
- Ep. 22 · Moriarty Sabotages the World Flight Championship While Rivals Attempt to Stop Him
- Ep. 23 · Hound investigates the unusual theft of a parrot by Moriarty from a train
- Ep. 24 · Hound conceals the theft of Big Ben's bell to protect national dignity
- Ep. 25 · Moriarty hides a large diamond in a doll but faces unexpected consequences