“But surely this is somewhat irrelevant?”
“Not entirely,” said Holmes.
--Arthur Conan Doyle, “The Adventure of the Priory School”
Leigh: We have another mystery this week that focuses on bicycles. This time, more specifically bicycle tires instead of people riding on them. We have a very important Duke whose son has gone missing from school. The headmaster then contacts Sherlock Holmes and says that he's missing along with the German teacher. Of course kidnap is the obvious red herring here but it's a Sherlock Holmes mystery and these are rarely that simple.
Holmes goes to the school to attempt to figure out the problem and Watson and the audience actually gets to come along. Holmes and Watson go all along every bit of field and anywhere there might be a path to find the bicycle tire marks from the missing bicycle that was presumably used in the possible kidnapping. They eventually find the trail and then the dead German teacher. DUN DUN DUN!
And that's when the mystery gets exciting and slightly convoluted and becomes a bit of a rip off. There's a worker who had been fired from the Duke's home. There's an illegitimate son who's jealous of the Duke's younger son. There's of course a murder and murderer and still a missing boy. Holmes ends up solving the whole thing because the tread marks left by the cows along the trails didn't follow a cow's natural stride. This annoyed me. Did it annoy you?