Chad Allen (born June 5, 1974) is an American retired actor and psychologist. Beginning his career at the age of seven, Allen is a three-time Young Artist Award winner and GLAAD Media Award honoree. He was a teen idol during the late 1980s as David Witherspoon on the NBC family drama Our House and as Zach Nichols on the NBC sitcom My Two Dads before transitioning to an adult career as Matthew Cooper on the CBS western drama Dr. Quinn: Medicine Woman. He announced his retirement from acting in April 2015. Early life Allen was born Chad Allen Lazzari on June 5, 1974, in Cerritos, California, and grew up in Artesia. He has a twin sister named Charity and a brother named Steve Lazzari who works for Union Pacific Railroad. Allen is of predominantly Italian origin, with a "dose" of German origin. He was raised in a "strict" Roman Catholic household and regards himself as being a "deeply spiritual person" because of his upbringing. Allen attended St. John Bosco High School in Bellflower, California. Career Allen guest-starred on several prime time series, including an early episode of Airwolf for which he was nominated as "Best Young Actor: Guest in a Series" at the 6th Youth in Film Awards and St. Elsewhere, in which he played autistic child Tommy Westphall (1983–88). The series final episode, "The Last One", ends with the indication that all of its storylines occurred in Tommy's imagination. In 1983, he appeared on Cutter to Houston, playing "a kid who got hurt and had to be given mouth-to-mouth and carried to the waiting chopper by Dr. Hal Wexler (Alec Baldwin)". "I thought it was the greatest job I had ever gotten," he later stated. Allen's first regular role was as David Witherspoon on Our House (1986–88). In 1989–90, he had a recurring role as Zach in My Two Dads. Allen's next contract role was Matthew Cooper in Dr. Quinn, Medicine Woman alongside Jane Seymour (1993–98). During the final season of his run on St. Elsewhere, Allen was teamed with his sister Charity Allen on an episode of NBC's Saturday morning children's game show I'm Telling!. Starting with Third Man Out (2005), Allen stars as Donald Strachey, a gay private detective in a monogamous relationship, in a series of television movies for the here! network based on novels by Richard Stevenson. The sequel, Shock to the System (2006), was