David Doyle was born in Omaha, Nebraska, the son of Mary Ruth (née Fitzgerald) and Lewis Raymond Doyle, an attorney. His maternal grandfather, John Fitzgerald, was a prominent railroad builder and banker in Nebraska. He graduated from Campion High School in Prairie du Chien, Wisconsin, in 1947. He is best remembered for his role as detective John Bosley on the television series Charlie’s Angels, one of only two actors (the other being original angel Jaclyn Smith) to appear in all 110 episodes of the series (1976–81). He lent his distinctive raspy voice to the character Grandpa Lou Pickles on the Nickelodeon animated television series Rugrats until his death. Joe Alaskey then assumed the role of Grandpa Lou. Doyle made a number of appearances as a guest on the game show Match Game in the late 1970s and early 1980s. He appeared on one week of Password Plus in 1980, three weeks of Super Password, and on Tattletales with his wife Anne in 1982. David Doyle was a stage actor, as well. He played Orgon in the 1964 premier of Richard Wilbur’s translation of Tartuffe at the Fred Miller Theater in Milwaukee. His sister Mary played the fulminate maid, Dorisse, in the same production. Doyle was married twice. His first wife predeceased him. His sister, Mary, who died from lung cancer in 1995, was a stage actress. David Doyle died in Los Angeles, California, of a heart attack on February 26, 1997, aged 67, and was cremated.