Holmes - somewhat reluctantly, and incidentally on drugs - takes Watson to visit his old school acquaintance Reginald Musgrave, the scion of one of the oldest families in Sussex. Musgrave's butler has been acting very strangely, and there's an ancient document - a ritual - that has haunted the family since the 17th Century. Can Holmes and Watson solve the case? Of course they can - that's a given. But what else is entailed? That's the fun part.

Holmes and Watson are visited by none other than the Prime Minister, whose Foreign Secretary has somehow lost a very important diplomatic letter. Is it a plot, of international intrigue? Or something a little closer to home? A bloodstained rug that doesn't quite line up provides Holmes with the key to the mystery.

The heir to the Duke of Holdernesse has disappeared from his posh school. Eton jackets, bicycle tires, and a search around the moors of Yorkshire leads to the limestone caves of the Hellfire Club - a site of debauchery so appealing, Benjamin Franklin visited more than once.

Sherlock Holmes's remarkable return to Baker Street, as he eliminates the last of Moriarty's gang and Watson, for some inexplicable reason, dons a fez.

In the heartbreaking finale of the first season of The Adventures of Sherlock Holmes, Watson writes of Holmes's final showdown with his nemesis Moriarty.

A red-haired shop-owner is presented with an amazing opportunity, meant only for red-haired men - come to an office and copy out the A volume of the Encyclopedia Britannica. But suddenly, he reports for work and the office is shut down. What’s going on? 

A young, successful doctor comes to Holmes because his benefactor, Mr. Blessington, is freaking out - terrible dreams, night sweats, hallucinations. Soon after, Blessington hangs himself. Or does he? Holmes and Watson uncover the real story.

A young lawyer is in peril - he'd just drawn up a will for a new client, who had made the young lawyer his sole heir. But the client - a builder in Lower Norwood - appears to be dead. The lawyer is being pursued by the police for murdering the builder. Can Holmes and Watson clear the lawyer's name?

We are introduced to Mycroft Holmes! He asks Holmes and Watson to investigate the case of a Greek translator who's been abducted and forced to translate for nefarious characters.

Violet Hunter comes to Holmes and Watson for help in an unusual case: she's been offered a governess position, but the employer insists that she cut her beautiful chestnut hair. The position is odd in other ways, too - she has to wear an electric blue dress and sit by a window at certain hours of the day. The episode features a young Natasha Richardson, a lecherous and leering Joss Ackland, and a country estate named for trees that don't exist on it anymore.