Dean Stockwell (born March 5, 1936) is an American actor of film and television, with a career spanning over 65 years. As a child actor under contract to MGM he first came to the public's attention in films such as Anchors Aweigh and The Green Years; as a young adult he played a lead role in the 1957 Broadway and 1959 screen adaptations of Meyer Levin's Compulsion, a novel based on the true-life story of Leopold and Loeb.

More recently he became widely known for television roles, playing Rear Admiral Albert "Al" Calavicci in the 1989–1993 television series Quantum Leap, and Brother Cavil in the Sci Fi Channel 21st century revival of Battlestar Galactica.

Stockwell was born Robert Dean Stockwell in North Hollywood, Los Angeles, California, the younger son of Nina Olivette, an actress and dancer, and Harry Stockwell, an actor and singer. His elder brother was actor Guy Stockwell.

In 1945, he appeared in a main character role (Donald Martin) in the musical movie Anchors Aweigh alongside Frank Sinatra and Gene Kelly. Some of his other notable child roles included that of Robert Shannon in The Green Years (1946), Gregory Peck's son in Gentleman's Agreement (1947), and as Lionel Barrymore's grandson and Richard Widmark's protege in Down to the Sea in Ships (1949). He also starred in the lead role of the film The Boy with Green Hair in 1948, and in a film adaptation of The Secret Garden in 1949. In 1950, he appeared in a lead role alongside Errol Flynn in Kim, the film of Rudyard Kipling's novel of the same name.

Ira Dean Jagger (November 7, 1903 – February 5, 1991) was film actor who received an Academy Award for his role in Henry King's Twelve O'Clock High (1949).

Born in Columbus Grove, Ohio, Jagger made his film debut in The Woman from Hell (1929) with Mary Astor. He became a successful character actor, without becoming a major star, and appeared in almost 100 films in a career that lasted until shortly before his death.

Jagger made his breakthrough to major roles in film with his portrayal of Brigham Young in Brigham Young (1940). According to George D. Pyper, a technical consultant on the film who had personally known Brigham Young, said that Jagger not only resembled Young, he also spoke like him and had many of his mannerisms.

Jagger then played prominent roles in Western Union (1941), Sister Kenny (1946) and Raoul Walsh's Western neo-noir Pursued (1947).

He received an Academy Award for Best Supporting Actor for his role in Twelve O'Clock High (1949). In the film he played the middle-aged adjutant Major Stovall, who acts as an advisor to the commander General Savage (Gregory Peck), and is tasked with writing letters to the next of kin of slain airmen. He appeared in the biblical epic The Robe (1953) as the weaver Justus of Cana, "whose words were like his work: simple, lasting, and strong," as Marcellus Gallio (Richard Burton) put it later in the film.

Edmond O'Brien (September 10, 1915 – May 9, 1985) was an American actor who is perhaps best remembered for his role in D.O.A. (1950) and his Oscar winning role in The Barefoot Contessa (1954). His many memorable films included The Killers, White Heat, The Man Who Shot Liberty Valance and The Wild Bunch.

Born in New York, New York of English and Irish stock, O'Brien made his film debut in 1938, and gradually built a career as a highly regarded supporting actor. During World War II, he served in the U.S. Army Air Forces and appeared in the Air Forces' Broadway play and film Winged Victory.

He won an Academy Award for Best Supporting Actor for his role as a harried publicity agent in The Barefoot Contessa (1954) and was also nominated for his role as an alcoholic U.S. senator in Seven Days in May (1964). Prior to that, O'Brien had an acclaimed role in 1950's D.O.A. as a poisoned man who sets out to find his own murderer before he dies.

His other notable films include The Killers (1946), White Heat (1949), The Girl Can't Help It (1956), The Man Who Shot Liberty Valance (1962), Birdman of Alcatraz (1962), The Longest Day (1962), Fantastic Voyage (1966), and The Wild Bunch (1969).

Forrest Tucker (February 12, 1919 – October 25, 1986) was an American actor in both movies and television from the 1940s to the 1980s. Tucker, who stood 190 cm (6'4") tall and weighed 93 kg (200 lb), appeared in nearly 100 action films in the 1940s and 1950s.

Forrest Meredith Tucker was born in Plainfield, Indiana, a son of Forrest A. Tucker and his wife Doris Heringlake. He began his performing career at age 14 at the 1933 Chicago World's Fair, pushing the big wicker tourist chairs by day and singing "Throw Money" at night. After his family moved to Washington, D.C., Tucker attracted the attention of Jimmy Lake, the owner of the Old Gaiety Burlesque Theater, by winning its Saturday night amateur contest on consecutive weeks. After his second win, Tucker was hired full time as master of ceremonies at the theatre. However, his initial employment there was short-lived; it was soon discovered that Tucker was underage. Tucker graduated from Washington-Lee High School, Arlington, Virginia, near Washington, D.C. in 1938.

Wallace Ford (12 February, 1898 – 11 June, 1966) was an English film and television actor who, with his friendly appearance and stocky build later in life, appeared in a number of film westerns and B-movies.

Born Samuel Jones Grundy in Bolton, Lancashire, England, he spent childhood in a Dr. Barnardo's home. At an early age he was adopted by a farmer from Manitoba, Canada where he was ill treated. About the age of eleven, he ran away and did odd jobs later becoming an usher in a theatre.

Following his discharge from the army after World War I, he became a vaudeville actor in a stock company before performing on Broadway.

He started on a film career when Metro-Goldwyn-Mayer gave him part in the film Possessed and went on to appear in over 200 films including 13 directed by John Ford. (The two were unrelated.)

He also appeared in a 1964 episode of The Andy Griffith Show as Roger Hanover, Aunt Bee's old flame. He is buried with an unmarked grave in Culver City's Holy Cross Cemetery.