William Nigel Ernle Bruce (4 February 1895 – 8 October 1953) was a British character actor on stage and screen.
 He was best known for his portrayal of Dr. Watson in a series of films and in the radio series "The New Adventures of Sherlock Holmes" (starring Basil Rathbone as Sherlock Holmes).
 Bruce is also remembered for his roles in the Alfred Hitchcock films "Rebecca" and "Suspicion".
Howard Marion-Crawford (17 January 1914 – 24 November 1969), the grandson of writer F. Marion Crawford, was an English character actor, best known for his portrayal of Dr. Watson in the 1954 television adaptation of Sherlock Holmes.
 In 1948, Marion-Crawford had played Holmes in a radio adaptation of "The Adventure of the Speckled Band", making him one of the few actors to portray both Holmes and Watson.
 He is also known for his portrayal of Dr. Petrie in a series of low budget Fu Manchu films in the 1960s, and playing Paul Temple in the BBC Radio serialisations.
The Hound of the Baskervilles (Russian: "Приключения Шерлока Холмса и доктора Ватсона: Собака Баскервилей" , English: The Adventures of Sherlock Holmes and Dr. Watson: The Hound of the Baskervilles ) is a 1981 Soviet film adaptation of Arthur Conan Doyle's novel "The Hound of the Baskervilles".
 It was the third installment in the TV series about adventures of Sherlock Holmes and Doctor Watson.
 A potent streak of humour ran through the film as concerns references to traditional British customs and stereotypes, ensuring the film's popularity with several generations of Russophone viewers.
 Other features of this best entry in the series include excellent exterior shots which closely match the novel's setting in the Dartmoor marshland, as well as an all-star cast: in addition to the famous Livanov -Solomin duo as Holmes and Watson, the film stars the internationally acclaimed actor/director Nikita Mikhalkov as Sir Henry Baskerville and the Russian movie legend Oleg Yankovsky as Jack Stapleton.
Silver Blaze is a 1937 British, black-and-white crime and mystery film, based loosely on Arthur Conan Doyle's short story "Silver Blaze".
 It was directed by Thomas Bentley, and was produced by Twickenham Film Studios Productions.
 It stars Arthur Wontner as Sherlock Holmes, Ian Fleming as Dr. Watson and Ronald Shiner (uncredited) as Simpson the Stable Boy/Jockey.
 In the United States the film was released in 1941 by Astor Pictures, where it was also known as Murder at the Baskervilles, retitled by distributors to capitalize on the success of the Basil Rathbone Holmes film, "The Hound of the Baskervilles".
Stefan Artur Schnabel (2 February 1912, Berlin, Germany – 11 March 1999, Rogaro, Italy) was a German-born American actor who worked in theatre, radio, films and television.
 After moving to the United States in 1937 he became one of the original members of Orson Welles's Mercury Theatre repertory company.
 He portrayed Dr. Stephen Jackson on the CBS daytime TV series, "The Guiding Light", for 17 years.
Thunder in the City is a 1937 British drama film directed by Marion Gering and starring Edward G. Robinson, Luli Deste, Nigel Bruce and Ralph Richardson.
Peter Wingfield (born 5 September 1962) is a Welsh born television actor, well known for his television roles as Dan Clifford in "Holby City", Dr. Robert Helm in "Queen of Swords" and Inspector Simon Ross in "Cold Squad" but he is internationally best known for his role as the 5000-year-old Immortal Methos in the hit syndicated series "".
 He also portrayed Dr. James Watson in "Sanctuary".
Rudolf Lettinger (26 October 1865 in Hamburg – 21 March 1937 in Berlin-Schöneberg) was a German stage and film actor.
 He made his stage debut in 1883 when he played the role of Kosinsky in Friedrich Schiller's drama "The Robbers".
 Some of his more prominent roles in his prestigious stage career were "Cyrano de Bergerac" and Gessler in "William Tell".
 He also worked with acclaimed stage director Max Reinhardt.
 In 1912, Lettinger played his first film role in "Das Geheimnis von Monte Carlo".
 Lettinger appeared in over 90 films until 1931, mostly as a supporting actor.
 His best-known film is perhaps "The Cabinet of Dr. Caligari" (1920), where Lettinger portrayed Dr. Olsen.
Moonlight Sonata is a 1937 British drama film directed by Lothar Mendes and written by E. M. Delafield and Edward Knoblock.
 The film stars Ignacy Jan Paderewski, Charles Farrell, Marie Tempest, Barbara Greene and Eric Portman.
 The film was released on 11 February 1937, by United Artists.
Sherlock Holmes and Dr. Watson (Russian: Шерлок Холмс и доктор Ватсон , "Sherlok Kholms i doktor Vatson " ) is a 1979 Soviet film adaptation of Arthur Conan Doyle's novels about Sherlock Holmes.
 Directed by Igor Maslennikov it is the first of a 5-part TV film series (divided into 11-episodes) "The Adventures of Sherlock Holmes and Dr. Watson".
 The film is divided into two episodes – "The Acquaintance" (Russian: Знакомство , based on "The Adventure of the Speckled Band") and "Bloody Inscription" (Russian: Кровавая надпись , based on "A Study in Scarlet").

Question: The actor who portrayed Dr. Watson in a series of films and on radio was also in what 1937 British drama film?
Answer: Thunder in the City