Question: Mr. Wong, Detective is a 1938 American crime film directed by William Nigh and starring who, was an English actor who was primarily known for his typecast roles in horror films that depicted the characters Frankenstein and the Mummy?

Context paragraphs:
The Mystery of Mr. Wong: The Mystery of Mr. Wong is a 1939 American mystery film directed by William Nigh and starring Boris Karloff.

Rose of the Rio Grande: Rose of the Rio Grande is a 1938 American western drama film directed by William Nigh and starring Movita Castaneda as Rosita de la Torre.  When killers come after her wealthy brother Don Jose (Alvarado), she narrowly escapes with Sebastian (Renaldo) and hides out under the guise of a cabaret singer.  After her ruse is discovered by the real cabaret singer Anita (Basquette), Rosita is rescued by El Gato (Carroll).

The Headline Woman: The Headline Woman is a 1935 American crime film directed by William Nigh and starring Heather Angel and Ford Sterling.

Mr. Wong, Detective: Mr. Wong, Detective is a 1938 American crime film directed by William Nigh and starring Boris Karloff in his first appearance as Mr. Wong.

Doomed to Die: Doomed to Die is a 1940 American mystery film directed by William Nigh and starring Boris Karloff as Mr. Wong.  It is a sequel to the 1940 film, "The Fatal Hour".

Romance of the Limberlost: Romance of the Limberlost is a 1938 American drama film directed by William Nigh and starring Jean Parker, Eric Linden, and Marjorie Main.

Boris Karloff: William Henry Pratt (23 November 1887 – 2 February 1969), better known by his stage name Boris Karloff, was an English actor who was primarily known for his typecast roles in horror films that depicted the characters Frankenstein and the Mummy.  He portrayed Frankenstein's monster in "Frankenstein" (1931), "Bride of Frankenstein" (1935), and "Son of Frankenstein" (1939), which resulted in his immense popularity.  He also appeared as Imhotep in "The Mummy" (1932).

The Fatal Hour (1940 film): The Fatal Hour is a 1940 American thriller/ crime drama film.  It was directed by William Nigh, and starred Boris Karloff as Mr. Wong, Grant Withers, and Marjorie Reynolds.

The Mysterious Mr. Wong: The Mysterious Mr. Wong is a tongue-in-cheek 1934 mystery film starring Bela Lugosi as a powerful Fu Manchu type criminal mastermind of the Chinatown underworld, and Wallace Ford as a wisecracking reporter.  The film is based on Harry Stephen Keeler's 1928 short story "The Strange Adventure of the Twelve Coins of Confucius" one of three stories in Keeler's book "Sing Sing Nights".  Despite the name of the title character and being directed by William Nigh, it has no relation to Monogram Pictures later Mr Wong film series.  The character of Mr. Wong does not appear in the original story.

Mr. Wong in Chinatown: Mr. Wong in Chinatown is a 1939 American mystery film directed by William Nigh and starring Boris Karloff as Mr. Wong.

Supporting paragraphs: Mr. Wong, Detective Boris Karloff
Answer: Boris Karloff