question: What producer who died in 1978 developed American television detective show Mannix?
answer: Bruce Geller
context: Title: Levinson &amp; Link
  Passage: Richard Levinson and William Link were television producers and writers who collaborated for 43 years, until Levinson's death.  They created classic television detective series such as "Columbo", "Mannix", "Ellery Queen", "Murder, She Wrote" and "Scene of the Crime", as well as made-for-TV movies including "The Gun", "My Sweet Charlie", "That Certain Summer", "The Judge and Jake Wyler", "The Execution of Private Slovik", "Charlie Cobb: A Nice Night for a Hanging", "Rehearsal for Murder", and "Blacke's Magic".  They also collaborated on two feature films: "The Hindenburg" (1975) and "Rollercoaster" (1977).
  Title: La Chica de Ayer (TV series)
  Passage: La Chica de Ayer (English: "The Girl from Yesterday") is a Spanish television series which first aired on the channel Antena 3 between 26 April and 14 June 2009.  A detective show, it was based on the British series "Life on Mars" which featured a policeman suddenly transported back to 1973.  The Spanish version of the show was set four years later, in 1977, and took its name from the Spanish song "La Chica de Ayer" by Nacha Pop in a similar manner to the British version which was named after the David Bowie song "Life on Mars? ".  It featured Ernesto Alterio in the role of Samuel Santos, a modern-day police officer who finds himself in 1977 post-Franco Spain under the command of Quin Gallardo (Antonio Garrido), a tough old-school policeman contemptuous of his modern methods.
  Title: Gail Fisher
  Passage: Gail Fisher (August 18, 1935 – December 2, 2000) was an American actress who was one of the first black women to play substantive roles in American television.  She was best known for playing the role of secretary Peggy Fair on the television detective series "Mannix" from 1968 through 1975, a role for which she won two Golden Globe Awards and an Emmy Award; she was the first black woman to win either award.  She also won an NAACP Image Award in 1969.
  Title: Nick Dennis
  Passage: Nick Dennis (April 26, 1904 – November 14, 1980) was a Greek American film actor born in Thessaly, Greece.  The supporting actor, who began in films in 1947, was known for playing ethnic types (usually Greek) in films such as "Kiss Me Deadly" and the Humphrey Bogart film "Sirocco".  Dennis, who spoke Greek fluently, appeared in a number of television programs in the 1960s and 1970s including playing the parts of Orderly Nick Kanavaras on the medical drama "Ben Casey" and Uncle Constantine on the detective show "Kojak".
  Title: Bruce Geller
  Passage: Bruce Bernard Geller (October 13, 1930 – May 21, 1978) was an American lyricist, screenwriter, director, and television producer.
  Title: Explorations (Louis Bellson album)
  Passage: Explorations is an album by Argentine composer, pianist and conductor Lalo Schifrin and American drummer Louis Bellson recorded in 1964 and released on the Roulette label.  It was the first album composed entirely by Schifrin and features themes that would later be used in the television detective series "Mannix".
  Title: List of Mannix episodes
  Passage: The following is a list of episodes for the detective television series "Mannix" which aired from 1967 to 1975 in the United States on the CBS television network.  The title character, Joe Mannix, is an Armenian-American private investigator played by Mike Connors (who was also of Armenian heritage).  "Mannix" was created by Richard Levinson and William Link and developed by executive producer Bruce Geller (who also created "").
  Title: Mannix
  Passage: Mannix is an American television detective series that ran from 1967 to 1975 on CBS.  Created by Richard Levinson and William Link and developed by executive producer Bruce Geller, the title character, Joe Mannix, is a private investigator.  He is played by Mike Connors.
citations: Bruce Geller Mannix