All episodes for Season 1 are based on stories by Sir Arthur Conan Doyle, originally published in The Strand magazine and in Doyle's first collection of Sherlock Holmes short stories titled "The Adventures of Sherlock Holmes."

All episodes for Season 2 are based on stories by Sir Arthur Conan Doyle, originally published in The Strand magazine and in Doyle's first collection of Sherlock Holmes short stories titled "The Adventures of Sherlock Holmes."

The series continues under the name "The Return of Sherlock Holmes" for the next two years. Otherwise, it's the same series as "The Adventures of Sherlock Holmes". The main differences are that the stories come from Doyle's second collection of short stories titled,"The Return of Sherlock Holmes". Edward Hardwicke replaces David Burke as Dr. John Watson.

In addition to adaptations to some of Doyle's short stories from "The Return of Sherlock Holmes", there are also two feature-length TV movies based on novels written by Doyle: "The Sign of Four" and the ever popular "The Hound of the Baskervilles."

This 5th Season features adaptations of short stories found in Doyle's book, "The Casebook of Sherlock Holmes."

This isn't really a season so much as three feature length TV movies that were broadcast from 1991 through 1994, again with the same actors, production company and style as the others that came before.

The final season of Sherlock Holmes as portrayed by Jeremy Brett. His appearance has changed and he will soon die of heart failure.  The plan had been to adapt all of Doyle's Sherlock Holmes stories but time is running out for their star icon and Granada decided to end the series when Brett died.  These are the last performances from a great British actor who is classed as portraying one of the world's most iconic presentations of Sherlock Holmes.  The series was first known as "The Memoirs of Sherlock Holmes, after the title of the collected short stories written by Sir Arthur Conan Doyle.