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The Problem of Thor Bridge 

A governess is arrested for the murder of her employer's wife.


Michael A. Simpson (as Michael Simpson)


Arthur Conan Doyle (by) (as Sir Arthur Conan Doyle), Jeremy Paul (dramatised by)




Episode complete credited cast:
Jeremy Brett ... Sherlock Holmes
Edward Hardwicke ... Dr. Watson
Daniel Massey ... J. Neil Gibson
Celia Gregory Celia Gregory ... Maria Gibson
Catherine Russell ... Grace Dunbar
Niven Boyd Niven Boyd ... Marlow Bates
Andrew Wilde ... Sergeant Coventry
Stephen Howard ... Mr. Ferguson
Philip Bretherton ... Mr. Joyce Cummings Q.C.
Dean Magri Dean Magri ... Billy


When Maria Gibson is shot through the head while standing on the Thor Bridge on her estate, the family's governess, Grace Dunbar, is arrested for murder. Not only does she admit meeting her mistress on the bridge, the police find the murder weapon in her room. She vehemently denies killing the woman and Senator J. Neil Gibson, the dead woman's husband, believes her. He hires Sherlock Holmes to get to the bottom of it all. The Senator admits that he and Miss Dunbar have affections for one another but that neither of them had anything to do with the murder. Dr. Watson is convinced that the Senator is the culprit but Holmes comes to an entirely different conclusion. Written by garykmcd

Plot Summary | Plot Synopsis


TV-PG | See all certifications »






Release Date:

28 February 1991 (UK) See more »

Company Credits

Production Co:

Granada Television See more »
Show more on IMDbPro »

Technical Specs



Sound Mix:




Aspect Ratio:

1.33 : 1
See full technical specs »

Did You Know?


Holmes finds a picture of a South American landscape on a mantlepiece and says "See those unscalable cliffs which time and the foot of man have never touched, where monsters from the dawn of history might still roam". This is a reference to The Lost World, Holmes creator Arthur Conan Doyle's 1912 adventure novel, set in an unexplored plateau hidden in the Amazon jungle where dinosaurs still live. See more »


Watson's revolver, which plays a pivotal role in the solution of the mystery, is once again a Webley Mk IV .455, a revolver not fielded by the British army until 1915, some years after the story is set. See more »


[last lines]
Dr. Watson: You have helped a remarkable woman, Holmes. And a formidable man.
Sherlock Holmes: And if, as seems not unlikely, they should join forces?
Dr. Watson: Naturally I would wish them well.
Sherlock Holmes: Hmph. Magnanimous of you, Watson.
See more »

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User Reviews

Another very enjoyable Sherlock Holmes adaptation
29 June 2011 | by TheLittleSongbirdSee all my reviews

As some may be aware already, I am a big fan of the Sherlock Holmes stories and Granada adaptations. The Problem of Thor Bridge is one of the better adaptations/episodes of The Case-book of Sherlock Holmes. The pace is very solid on the whole, but there are one or two scenes with perhaps one too many pauses between each action. The story is very interesting with a solution that is clever and not too obvious. The production values are wonderful and very evocative costumes and sets wise while the photography is lovely. As always, the music is hauntingly beautiful, the writing thoughtful, the direction impressive and the acting outstanding not just the note-perfect performances from Jeremy Brett and Edward Hardwicke but also Daniel Massey. In conclusion, very enjoyable. 9/10 Bethany Cox

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