An unknown thief steals an important naval treaty from a Foreign Office clerk; Sherlock Holmes sets out to find it.



(by) (as Sir Arthur Conan Doyle), (developed for television by) | 1 more credit »




Episode complete credited cast:
Alison Skilbeck ...
Ronald Russell ...
Nicholas Geake ...
Charles Gorot
Pamela Pitchford ...
John Malcolm ...
David Rodigan ...
Eve Matheson ...
John Taylor ...
Dr Ferrier

Comic-Con 2017: All Aboard the IMDboat


July 20 to 23, 2017

Get entertainment news, trailer drops, and photos with IMDb's coverage of 2017 San Diego Comic-Con featuring host and IMDboat captain Kevin Smith. Watch our exclusive celebrity interviews, and tune in to our LIVE show from 3:30 to 5 p.m. PDT on Saturday, July 22.

Browse Our Guide to Comic-Con



An unknown thief steals an important naval treaty from the office of Mr. Percy Phelps, a Foreign Office clerk. Phelps's distress gives him a brain fever that lasts for nine weeks. As he begins to recover, he writes to his old schoolmate, Dr. Watson, begging him to invite Sherlock Holmes to investigate the matter and find the treaty. Otherwise, his honor and happiness are gone forever. Holmes takes up the case with zest, but gives Phelps no false hopes. The mystery is as dark and tangled as any he has known. Written by J. Spurlin

Plot Summary | Add Synopsis

Plot Keywords:

brain fever | See All (1) »


Crime | Drama | Mystery


TV-PG | See all certifications »


Official Sites:



Release Date:

8 May 1984 (UK)  »

Company Credits

Production Co:

Show detailed on  »

Technical Specs



Sound Mix:


Aspect Ratio:

1.33 : 1
See  »

Did You Know?


Holmes's "patriotic" V.R. done in bullets on the wall is visible in some shots. See more »


Sherlock Holmes: Help yourself to tobacco from the Persian slipper.
See more »

Crazy Credits

Illustrations by Paget from the original story are seen during the credits. See more »


Version of The Naval Treaty (1922) See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Another great mystery that will beg for a second view
8 October 2013 | by (United States) – See all my reviews

This episode puts us right in the middle of another great mystery when a young man, Percy Phelps, working very late at the foreign office is copying a very important treaty for the British Government. Being alone, he takes a small break to go get some coffee from the night watchman when suddenly the bell rings from his office. No one is suppose to be in the room. When Percy runs back upstairs he finds that the treaty had been stolen. Now his job and his honor have been stained. Percy becomes bedridden with guilt and his last straw will be to get Sherlock Holmes to take the case.

A very nice episode with plenty of situations that, at the end, all lead the viewer to think outside of their limit. A very well written script with fine acting throughout. This is an episode you will watch again to see how many clues that were missed on the first view. Good watch.

2 of 3 people found this review helpful.  Was this review helpful to you?

Contribute to This Page

Create a character page for: