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.
The Autobots and their human allies create a plan to bring back their deceased Autobot comrades from their previous battles for a final showdown with Quintessa and the Decepticons.
