National Lampoon's Christmas Vacation is a film that stars an actor known for playing Dr. Leonard Hofstadter in what CBS sitcom?
Johnny Galecki John Mark Galecki (born April 30, 1975) is an American actor. 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. 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), and "In Time" (2011).
Casey Sander Clinton O. "Casey" Sander (born July 6, 1956) is an American actor known as the character "Captain" Jimmy Wennick on the short-lived TV series "Tucker". His television credits also include "Criminal Minds", "The Golden Girls","Grace Under Fire", "Home Improvement", "Malcolm in the Middle", "Rules of Engagement", "Sons of Anarchy", "Mad Men", "Silicon Valley", "The Newsroom", "Buffy the Vampire Slayer" (on which he portrayed the father of Xander Harris), "Hunter", and "Marvin Marvin", among other shows. He has a recurring role on the TV sitcom "The Big Bang Theory" as Bernadette's father, Mike.