Johnny Galecki made his debut on the iconic sitcom "Roseanne" during its fourth season, portraying the…
ABC When "Roseanne" reconvened for a follow-up series that would…
CBS As Leonard Hofstadter in "The Big Bang Theory," Johnny…
Jean Baptiste Lacroix/Getty Images Johnny Galecki has had quite a…
CBS By the time he disappeared from Hollywood, Johnny Galecki…
CBS From 2007 to 2019, Johnny Galecki was a weekly fixture on the small screen playing scientist…