What is the name of this American actor, based known for a role on Roseanne, who also starred in Morgan's Ferry?
Morgan's Ferry: Morgan's Ferry is a 2001 American crime drama film starring Billy Zane, Henry Rollins, Kelly McGillis, Roscoe Lee Browne, Johnny Galecki, Muse Watson and directed by Sam Pillsbury. Johnny Galecki:  He is known for playing David Healy in the ABC sitcom "Roseanne" from 1992 to 1997 and Dr. Leonard Hofstadter in the CBS sitcom "The Big Bang Theory" since 2007.
i don't know