Ralph Morgan (July 6, 1883 – June 11, 1956) was a Hollywood film, stage and character actor, and the older brother of Frank Morgan (who played the title role in The Wizard of Oz, 1939).

Born in New York City as Raphael Kuhner Wuppermann, Ralph Morgan graduated from Columbia University with a law degree. However, he abandoned the world of jurisprudence for the vocation of journeyman actor, having already appeared in Columbia's annual Varsity Show. Morgan became so successful in stock and on Broadway that his younger brother, Frank, was encouraged to give acting a try. Frank's career would eventually overshadow that of his elder brother.

Ralph Morgan made his film debut in silent films in 1915 appearing in several production made on the East Coast. In the early talkie era he played such leading roles in such productions as Strange Interlude in 1932 and Rasputin and the Empress also in 1932. He later settled into secondary character parts. His quiet, dignified demeanor on screen was often employed for murder mysteries in which, more often than not, he would be exposed in the last reel as the killer. One of his memorable roles was in the 1942 serial Gang Busters, in which he played a brilliant surgeon turned master criminal. Morgan later worked in television, frequently in religious dramas filmed for Family Theater.

Mischa Auer (17 November 1905 – 5 March 1967) was a Russian-born American actor.

Auer was born Mikhail Semyonovich Unskovsky (Михаил Семёнович Унсковский) in St. Petersburg, Russia. His name is usually seen as Mischa Ounskowsky, Mischa being the German transliteration of Misha (the diminutive form of Mikhail), and Ounskowsky being the French transliteration of his surname. Auer's maternal grandparents were Hungarian-born violinist Leopold Auer, and his Russian wife, Nadine Pelikan. Mischa renamed himself after his grandfather.

He began stage work in the 1920s, then moved to Hollywood, where he first appeared in 1928 in Something Always Happens. He appeared in several small and mostly uncredited roles into the 1930s, appearing in such films as Rasputin and the Empress, Viva Villa!, The Yellow Ticket, the George Gershwin musical Delicious, the Paramount Pictures all-star revue Paramount on Parade and The Lives of a Bengal Lancer.

In 1936, Auer was cast as Alice Brady's protégé in the comedy My Man Godfrey, for which he was nominated for the Academy Award for Best Supporting Actor. From then on, he was regularly cast in zany comedy roles. Auer is at his zenith in such roles as the ballet instructor, Kolenkov, in the Best Picture-winning You Can't Take It with You (wherein he instructs Ann Miller with the line, "Ah, my little Pavlowa!") and the prince-turned-fashion designer in Walter Wanger's Vogues of 1938.

Milburn Stone (July 5, 1904 – June 12, 1980) was an American television actor, a nephew of Broadway comedian Fred Stone and the son of a shopkeeper, best known for his role as "Doc" (Dr. Galen Adams) on the CBS western series Gunsmoke. He also played a doctor, CDR Blake, in the 1943 film Gung Ho!.

Stone was born in Burrton in Harvey County in central Kansas. He began his screen career in the 1930s, having been featured in Monogram Pictures' series of "Tailspin Tommy" adventures. In 1940, he appeared with Marjorie Reynolds, Tristram Coffin, and I. Stanford Jolley in the comedy espionage film Chasing Trouble. He also played the liberal minded warden in Monogram Pictures', "Prison Mutiny", in 1943. Stone was signed by Universal Pictures in 1943 and became a familiar face in its features and serials. One of his film roles was a radio columnist in the Gloria Jean-Kirby Grant musical I'll Remember April. He made such an impression in this film that Universal gave him a starring role (and a similar characterization) in the 1945 serial The Master Key.

Warren William (December 2, 1894 – September 24, 1948) was a Broadway and Hollywood actor, popular during the early 1930s, who was later nicknamed the "king of Pre-Code". He was born Warren William Krech in Aitkin, Minnesota to parents Freeman E. and Frances Krech. He had a certain physical resemblance to John Barrymore. He attended the American Academy of Dramatic Arts. After moving from Broadway to Hollywood in 1931, he reached his peak as a leading man in early 1930s pre-Production Code films. He was a contract player at the Warner Bros. studio and was known for portraying amoral businessmen, lawyers, and other heartless types, including the Sam Spade character (renamed "Ted Shane") in the second filming of The Maltese Falcon, called Satan Met a Lady (1936) with Bette Davis.

He also played sympathetic roles, however, as in Imitation of Life, in which he portrayed Claudette Colbert's love interest. He appeared as her love interest again that year, when he played Julius Caesar to her Cleopatra in Cecil B. DeMille's version of Cleopatra. And he was the swashbucking d'Artagnan in the 1939 version of The Man in the Iron Mask, directed by James Whale.

Gail Patrick (June 20, 1911 – July 6, 1980) was an American film actress.

Born Margaret LaVelle Fitzpatrick, she appeared in 62 movies between 1932 and 1948, usually as the leading lady's extremely formidable rival; some of these roles include the second wife in My Favorite Wife (1940) with Irene Dunne and Cary Grant, Anna May Wong's sophisticated competitor in Dangerous to Know (1938), and Carole Lombard's spoiled sister in My Man Godfrey (1936).

She also played the lead in films such as James Whale's Wives Under Suspicion (1938) and Robert Florey's Disbarred (1939).

Patrick retired from acting in films in 1948 and later, with her third husband Thomas Cornwell Jackson, became a producer of the Perry Mason television series (1957–1966).

She died from leukemia at age 69 in Los Angeles.