A Dr. John Preston, PsyD, Psychology, answered. The average age of onset for bipolar disorder is 23, although late-adolescent onset is fairly common. Bipolar disorder can occur as early as 6 years old or as late as 50. Dr. John Preston, PsyD, Psychology, answered. The average age of onset for bipolar disorder is 23, although late-adolescent onset is fairly common. Bipolar disorder can occur as early as 6 years old or as late as 50.
John Richard Schneider III. John Richard Schneider III (born April 8, 1960) is an American actor and singer. He is best known for his portrayal of Bo Duke in the 1980s American television series The Dukes of Hazzard, and as Jonathan Kent on Smallville, a 2001 television adaptation of Superman.
From left to right: John Schneider, Tom Wopat and Ben Jones as Bo Duke, Luke Duke and Cooter, respectively, in the TV series 'The Dukes of Hazzard', circa 1983. Fotos International/Hulton Archive/Getty Images. Television.