The first American television series of Sherlock Holmes adventures aired in syndication in the fall of 1954. The 39 half-hour mostly original stories were produced by Sheldon Reynolds and filmed in France by Guild Films, starring Ronald Howard (son of Leslie Howard) as Holmes and Howard Marion Crawford as Watson. Archie Duncan appeared in many episodes as Inspector Lestrade (and in a few as other characters). Richard Larke, billed as Kenneth Richards, played Sgt. Wilkins in about fifteen episodes. The series' associate producer, Nicole Milinaire, was one of the first women to attain a senior production role in a television series.
Several sets were built in Paris for the street outside 221B Baker Street and the flat itself, both of which were designed by Michael Weight, the same man who built the Festival of Britain 221B exhibit. There were a number of other sets built for a variety of locations and then redressed as necessary.
There was very little location work and most of the series was filmed in the studio with many stock shots giving the impression of London. However, on a few occasions, such as "The Case of the Eiffel Tower", the French filming locations were used. French actors were extensively used in small parts and several affected English accents with varying levels of success.
Many of the episodes were directed by Steve Previn, the brother of composer André Previn. In 1980, Reynolds produced a second Sherlock Holmes TV series, entitled Sherlock Holmes and Dr. Watson. Many of the 1954 TV episodes were remade in the second series. (Source: wikipedia.org)