How I Met Your Mother has been off the air for a few weeks now, but it returns in a major way Monday night.
John Lithgow guest stars in a role that isn't merely legendary... it's legendaddy! The veteran actor will come aboard next week as Barney's never-before-seen father.
The man high fives, orders the same drink as his son and comes across in the following preview like the patriarch Barney has always wanted. Check out a few clips now: