when did johnny galecki first appear on roseanne
Johnny Galecki John Mark Galecki (born April 30, 1975)[1] is an American actor. He is known for playing Leonard Hofstadter in the CBS sitcom The Big Bang Theory since 2007 and David Healy in the ABC sitcom Roseanne from 1992 to 1997 and briefly reprised the role during its 2018 revival. Galecki also appeared in the films National Lampoon's Christmas Vacation (1989), Prancer (1989), Suicide Kings (1997), I Know What You Did Last Summer (1997), Bookies (2003), In Time (2011), and Rings (2017).
Roseanne The Conners win the state lottery jackpot of $108 million; Dan ponders the meaning of life, Jackie meets her prince, DJ finds love, and Darlene, after some trouble, gives birth. John Goodman is absent for most of the season, as he was busy filming The Big Lebowski; in later episodes, Goodman resembles his "Lebowski" character Walter Sobchak.