Question: How old was Alan Alda's brother when he died?

Context articles: Whispers in the Dark (film)
Arnold Vinick
Sweet Liberty
Alan Alda
Antony Alda
Doreen Cannon
Dreams (M*A*S*H)
QED (play)
Robert Alda
Life Time (M*A*S*H episode)

Whispers in the Dark is a 1992 American thriller about a psychiatrist whose patient's lover may be a serial killer.
 The film starred Annabella Sciorra, Jamey Sheridan, Alan Alda, Jill Clayburgh, John Leguizamo, Deborah Unger and Anthony LaPaglia.
 The film was released by Paramount Pictures on August 7, 1992.
 It was nominated for a Razzie Award for Alan Alda as Worst Supporting Actor.
Arnold Vinick is a fictional character on the television series "The West Wing" played by Alan Alda.
 The role earned Alda the Primetime Emmy Award for Outstanding Supporting Actor in a Drama Series in 2006.
Sweet Liberty is a 1986 American comedy film written and directed by Alan Alda, and starring Alda in the lead role, alongside Michael Caine and Michelle Pfeiffer, with support from Bob Hoskins, Lois Chiles, Lise Hilboldt, Lillian Gish, and Larry Shue.
Alan Alda ( ; born Alphonso Joseph D'Abruzzo; January 28, 1936) is an American actor, director, screenwriter, and author.
 A seven-time Emmy Award and Golden Globe Award winner, he is widely known for his roles as Captain Hawkeye Pierce in the TV series "M*A*S*H" (1972–1983), hosting of "Scientific American Frontiers", and as Arnold Vinick in "The West Wing" (2004–2006).
 He has also appeared in many feature films, most notably in "Crimes and Misdemeanors" (1989), as pretentious television producer Lester, and "The Aviator" (2004) as U.S. Senator Owen Brewster, the latter of which saw Alda nominated for the Academy Award for Best Supporting Actor.
Antony Alda (December 9, 1956 – July 3, 2009) was an American actor who grew up in a famous acting family.
 The son of Robert Alda, he was born in France, his early studies were in Rome and he finished at The Juilliard School in New York City.
 An active actor, he appeared on stage, and in film, and on television, including his role as Johnny Corelli in "Days of Our Lives".
 His career culminated in writing, directing, and performing in "Role of a Lifetime".
 He died at age 52.
Doreen Cannon (21 October 1930) was born and raised in New York City.
 She trained as an actress at the HB Studio in Manhattan for over 10 years with the famous Uta Hagen and Herbert Berghof.
 Her contemporaries and fellow students were Peter Falk, Geraldine Page, Sandy Dennis, Maureen Stapleton, Anne Meara and Jerry Stiller.
 She appeared in many plays off Broadway and in Summer Stock alongside such stars as Dorothy Lamour, Robert Alda, Alan Alda and Basil Rathbone.
 She married an English Property Developer David Cannon in NYC and came over to London in 1959.
 She was subsequently invited by George Devine to teach master workshops at The Royal Court Theatre.
"Dreams" is an episode from the television series "M*A*S*H".
 It was the 22nd episode of the eighth season, broadcast and aired on February 18, 1980 and repeated September 1, 1980.
 It was directed by Alan Alda.
 "Dreams" was conceived by James Jay Rubinfier and co-written with Alan Alda.
 The episode received two prestigious writing honors: The Humanitas Prize (1980), and a Writers' Guild of America nomination for episodic television writing in the dramatic category, which was a first as M*A*S*H received WGA nominations in both comedy and drama categories that same year.
 The laugh track is omitted for this episode.
QED is a play by American playwright Peter Parnell that chronicles significant events in the life of Nobel Prize-winning physicist Richard Feynman.
 It presents scenes from a fictional day in Feynman's life, less than two years before his death, interweaving many strands from his biography, from the Manhattan project to the "Challenger" disaster inquiry to more personal topics such as the death of Feynman's wife and his own fight with cancer.
 The play, which grew out of a collaboration between Parnell, actor Alan Alda, and director Gordon Davidson, premiered in 2001.
 The original production, directed by Davidson and starring Alda as Feynman, was performed first at the Mark Taper Forum in Los Angeles and, from late 2001 to mid-2002, on Broadway.
Robert Alda (February 26, 1914 – May 3, 1986) was an American theatrical and film actor and father of actors Alan and Antony Alda.
 A talented singer and dancer, Alda was featured in a number of Broadway productions before moving to Italy during the early 1960s.
 He appeared in many European films over the next two decades, occasionally returning to the U.S. for film appearances such as "The Girl Who Knew Too Much" (1969).
"Life Time" is the 11th episode in the eighth season of the CBS television series "M*A*S*H".
 It originally aired on November 26, 1979, it was directed by Alan Alda and was co-written by Alan Alda and Dr. Walter D. Dishell, M.D., the latter of whom was the show's medical consultant, along with phantom assistance from authors W.C. Heinz, Ring Lardner, Jr., who had written the script for the film "MASH," and even Richard Hooker, himself a former U.S. Army MASH unit surgeon, and author of the 1968 novel "," from which the film and series both drew their inspirations.