Holmes and Watson retreat to a quiet country manor so Holmes can recuperate from a vague illness, take drugs, and clown on landed gentry. But when the far smarter butler goes missing an ancient catechism holds the only clues. Megan Knoll returns to The Study in time to help crack The Musgrave Ritual!

"The Musgrave Ritual" was first broadcast on ITV, on 30 July 1986, and is based off the Sir Arthur Conan Doyle story of the same name.

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