09/05/2007 AT 4:00 PM ET
He may not be getting much sleep, but Patrick Dempsey is having fun with fatherhood and filming Season 4 of Grey’s Anatomy.
It’s a sentiment he echoes when asked about filming the latest installment of his hit TV show: “It’s a lot lighter, people are having more fun.”
“The energy and the adjustments make a big difference,” he says, referring to the departure of Isaiah Washington after an on-set altercation between the stars last season.
Definitely pumped to be back at Seattle Grace, he declares, “I’m going to go save some lives again!”
“You can get those little go carts,” he says, but there’ll be “no pressure” for them to race like dad.