Johnny Galecki is a Belgian-born American actor, best known for his roles as David Healy in Roseanne, Rusty Griswold in National Lampoon's Christmas Vacation, and as Leonard Hofstadter in The Big Bang Theory.
A mouse named Fievel gets separated from his parents on their way to America and has to find a way to search for his family while helping out with some new friends to get away with the cats from the American land.
