X

Join or Sign In

Sign in to customize your TV listings

Continue with Facebook Continue with email

By joining TV Guide, you agree to our Terms of Use and acknowledge the data practices in our Privacy Policy.

BIG BANG's Johnny Galecki explains why he loved Christmas episode.

Matt Mitovich interviews Johnny Galecki on the set of Big Bang Theory where they discuss romance, season finale and supportive cast and crew.|The Big Bang Theory|Johnny Galecki|Matt Mitovich|