Doris Singleton, "I Love Lucy" Neighbor, Dies at 92 LOS ANGELES (AP) - Doris Singleton, who played a recurring role on the hit 1950s sitcom "I Love Lucy," died here on Tuesday. She was 92. Doris Singleton, left, with Lucille Ball in "I Love Lucy." Lucie Arnaz, the daughter of Lucille Ball and Desi Arnaz, confirmed the death in a post on her Facebook page. Ms. Singleton appeared on dozens of other TV shows in the 1950s, "60s and "70s, including another Lucille Ball program, "Here's Lucy," "Perry Mason," "All in the Family" and "Days of Our Lives." She played Margaret Williams, the mother-in-law of Chip Douglas, in later episodes of "My Three Sons." But she is probably best remembered for her role in 10 episodes of "I Love Lucy" as Caroline Appleby (her character was originally called Lillian Appleby), the wife of a radio station owner played by Hy Averback. "She was sort of Lucy's nemesis" because both had young sons they would brag about, Ms. Singleton said in a 2005 interview for the Archive of American Television of the Academy of Television Arts & Sciences Foundation. There was a rivalry there, but she had to be nice, Lucy had to be nice to Caroline, because her husband owned the radio station. Ms. Singleton appeared in a memorable episode that featured Ms. Ball and Harpo Marx mirroring each other's movements. Mr. Arnaz died in 1986 and Ms. Ball in 1989. Dorothea Singleton was born Sept. 28, 1919, in Brooklyn. She was a professional ballet dancer in her teens and became a singer and radio actress. She was married to the comedy writer Charlie Isaacs for 61 years before his death in 2002. Ms. Singleton told the television archive that the shooting schedule for "My Three Sons" was tailored for Fred MacMurray, the star, and that she was required to leave her clothes for the show at the studio for six weeks. When she asked why, she was told: "Well, because Fred doesn't come in until after all the other scenes are shot, and then he does the scenes with the people that he's involved with, but you have to leave the clothes there because we never know if we're going to have to do retakes on something." Because she had no scenes with Mr. MacMurray, she added, she never met him. Correction: July 5, 2012 An earlier version of this obituary incorrectly described the character played by Ms. Singleton on "I Love Lucy." Her character, Caroline Appleby, was a friend and rival of Lucy Ricardo, the character played by Lucille Ball, but she was not a neighbor.