Rondo Hatton (April 22, 1894 – February 2, 1946) was an American actor who had a brief, but prolific career playing thuggish bit parts in many Hollywood B-movies. He was known for his brutish facial features which were the result of acromegaly, a disorder of the pituitary gland.

Hatton was born Rondo K. Hatton in Hagerstown, Maryland to Stewart Price and Emily Zarring Hatton, a pair of Missouri-born teachers. The Hatton family moved several times during Rondo's youth, to Hickory, North Carolina, and to Charles Town, West Virginia, and at last to Tampa, Florida, where family members owned a business. Following his father's death, Hatton, his mother, and his younger brother Stewart moved in with his maternal grandmother in Tampa. There he obtained work as a sportswriter for the local newspaper. He worked as a journalist until after World War I when the symptoms of acromegaly developed.

Acromegaly distorted the shape of Hatton's head, face, and extremities in a gradual but consistent process. Hatton, who reportedly had been voted the handsomest boy in his class at Hillsborough High School, eventually became severely disfigured by the disease. Because the symptoms developed in adulthood (as is common with the disorder), the disfigurement was incorrectly attributed later by film studio publicity departments to his exposure to a German mustard gas attack during service in World War I. Whether Hatton actually served in combat is unclear, though it has been reported that he served on the Mexican border and in France.

Val Lewton (May 7, 1904 – March 14, 1951) was an American film producer and screenwriter, best known for a string of low-budget horror films he produced for RKO Pictures in the 1940s.

Lewton was born Vladimir Ivanovich Leventon (Russian: Владимир Иванович Левентон, Ukrainian: Володимир Іванович Левентон) in Yalta, Imperial Russia (now in Ukraine), in 1904. He was of Jewish descent, the son of moneylender Max Hofschneider and Nina Leventon, a pharmacist's daughter. The family converted to Christianity. He was nephew of actress Alla Nazimova.

His mother left his father and moved to Berlin, taking her children with her. In 1909, they emigrated to the United States, where his name was changed to Val Lewton. He was raised in suburban Port Chester, New York.

He studied journalism at Columbia University and authored eighteen works of nonfiction, fiction, and poetry. Lewton once lost his job as a reporter for the Darien-Stamford Review after it was discovered that a story he wrote about a truckload of kosher chickens dying in a New York heat wave was a total fabrication.

Sir Philip St. John Basil Rathbone, KBE, MC, Kt (13 June 1892 – 21 July 1967) was a South African-born British actor. He rose to prominence in England as a Shakespearean stage actor and went on to appear in over 70 films, primarily costume dramas, swashbucklers, and, occasionally, horror films. He frequently portrayed suave villains or morally ambiguous characters, such as Murdstone in David Copperfield (1935) and Sir Guy of Gisbourne in The Adventures of Robin Hood (1938). His most famous role, however, was heroic—that of Sherlock Holmes in fourteen Hollywood films made between 1939 and 1946 and in a radio series. His later career included Broadway and television work; he received a Tony Award in 1948 as Best Actor in a Play.

He was born Philip St. John Basil Rathbone in Johannesburg, South African Republic, to English parents Edgar Philip Rathbone, a mining engineer and scion of the Liverpool Rathbone family, and Anna Barbara née George, a violinist. He had two older half brothers Harold and Horace as well as two younger siblings, Beatrice and John. The Rathbones fled to England when Basil was three years old after his father was accused by the Boers of being a British spy near the onset of the Second Boer War at the end of the 1890s.

Sherlock Holmes ( /ˈʃɜrlɒk ˈhoʊmz/) is a fictional detective created by Scottish author and physician Sir Arthur Conan Doyle. The fantastic London-based "consulting detective", Holmes is famous for his astute logical reasoning, his ability to adopt almost any disguise, and his use of forensic science skills to solve difficult cases.

Holmes, who first appeared in publication in 1887, was featured in four novels and 56 short stories. The first novel, A Study in Scarlet, appeared in Beeton's Christmas Annual in 1887 and the second, The Sign of the Four, in Lippincott's Monthly Magazine in 1890. The character grew tremendously in popularity with the first series of short stories in Strand Magazine, beginning with A Scandal in Bohemia in 1891; further series of short stories and two novels published in serial form appeared between then and 1927. The stories cover a period from around 1880 up to 1914.

All but four stories are narrated by Holmes's friend and biographer, Dr. John H. Watson; two are narrated by Holmes himself ("The Blanched Soldier" and "The Lion's Mane") and two others are written in the third person ("The Mazarin Stone" and "His Last Bow"). In two stories ("The Musgrave Ritual" and "The Gloria Scott"), Holmes tells Watson the main story from his memories, while Watson becomes the narrator of the frame story. The first and fourth novels, A Study in Scarlet and The Valley of Fear, each include a long interval of omniscient narration recounting events unknown to either Holmes or Watson.

William Castle (April 24, 1914 – May 31, 1977) was an American film director, producer, screenwriter, and actor. Castle was known for directing films with many gimmicks which were ambitiously promoted, despite being reasonably low budget B-movies.

William Castle was born William Schloss in New York City to a Jewish family. Schloss is German for "castle", and Castle chose to translate his surname into English to use as his pseudonym. Orphaned at the age of 11, he would drop out of high school and spend most of his teenage years working on Broadway in a number of jobs ranging from set building to acting. This stood him in good stead when he became a director, and he left for Hollywood at the age of 23, going on to direct his first film six years later. He also worked an as assistant to director Orson Welles, doing much of the second unit location work for Welles' noir classic, The Lady from Shanghai.

Castle began directing films in the early 1940s, and later television, before moving on to the "gimmick films". Five of these were scripted by adventure novelist Robb White. Two of his films have been remade by his daughter Terry Ann Castle who served as Co-Producer, House on Haunted Hill in 1999, and Thirteen Ghosts in 2001 (the latter retitled Thir13en Ghosts).