Question: Who is the husband of the female star of the film Showdown ?

Context paragraphs:
Kay Francis: Kay Francis (January 13, 1905 – August 26, 1968) was an American stage and film actress.  After a brief period on Broadway in the late 1920s, she moved to film and achieved her greatest success between 1930 and 1936, when she was the number one female star at the Warner Brothers studio and the highest-paid American film actress.  Some of her film-related material and personal papers are available to scholars and researchers in the Wesleyan University Cinema Archives.

Andrea Palma (actress): Guadalupe Bracho Pérez-Gavilán, better known as Andrea Palma (16 April 1903 in Durango, Mexico – 6 October 1987 in Mexico City, Mexico) was a Mexican film stage and television actress.  She was considered the first major female star of the Mexican cinema after her role in the Mexican film "La Mujer del Puerto" (1934).

Louise Lester: Louise Lester (August 8, 1867 – November 18, 1952) was an American silent film actress.  She was the first female star of Western films.

Lauren Bacall: Lauren Bacall ( , born Betty Joan Perske; September 16, 1924 – August 12, 2014) was an American actress and singer known for her distinctive voice and sultry looks.  She was named the 20th greatest female star of Classic Hollywood cinema by the American Film Institute, and received an Academy Honorary Award from the Academy of Motion Picture Arts and Sciences in 2009, "in recognition of her central place in the Golden Age of motion pictures."

Showdown (1973 film): Showdown is a 1973 American Western film produced and directed by George Seaton.  It stars Rock Hudson, Dean Martin and Susan Clark.

Susan Clark: Susan Clark (born March 8, 1943) is a Canadian actress, known for her movie roles such as "Coogan's Bluff" and "", and for her role as Katherine on the American television sitcom "Webster", on which she appeared with her husband, Alex Karras.

Manfish: Manfish is a 1956 adventure film, released by United Artists in 1956 and originally filmed in DeLuxe Color.  Filmed in Jamaica, it was released in Great Britain as "Calypso".  It was based on the stories "The Gold-Bug" and "The Tell-Tale Heart" by Edgar Allan Poe.  Actor John Bromfield starred as Captain Brannigan and Lon Chaney Jr. played the role of Swede.  The leading female star was Tessa Prendergast, who played Alita.  Tessa later became a fashion designer and designed the white bikini of Ursula Andress for "Dr. No".  The film also featured the motion picture debut of Barbara Nichols.

Helen Twelvetrees: Helen Marie Twelvetrees (December 25, 1908 – February 13, 1958) was an American film and theatre actress, who became a top female star through a series of "women's pictures" in the early 1930s.

Katharine Hepburn: Katharine Houghton Hepburn (May 12, 1907 – June 29, 2003) was an American actress.  Known for her fierce independence and spirited personality, Hepburn was a leading lady in Hollywood for more than 60 years.  She appeared in a range of genres, from screwball comedy to literary drama, and she received four Academy Awards—a record for any performer—for Best Actress.  In 1999, Hepburn was named by the American Film Institute as the greatest female star of Classic Hollywood Cinema.

The Bigamist (1953 film): The Bigamist is a 1953 American drama film noir directed by Ida Lupino starring Joan Fontaine, Ida Lupino, Edmund Gwenn and Edmond O'Brien.  Producer/Screenwriter Collier Young was married to Fontaine at the time and had previously been married to Lupino.  "The Bigamist" has been cited as the first film in which a female star of the film directed herself.

Supporting paragraphs: Showdown (1973 film) Susan Clark
Answer: Alex Karras