John Stamos

The Full House star and new dad, 55, returns to TV in a recurring role as therapist Dr. Nicky on You (Sept. 9), Lifetime’s new series about obsessive love and social media. It centers on Joe (Penn Badgley), a bookstore manager who falls for one of his customers, Beck (Elizabeth Lail), and suddenly can’t think of anyone or anything else. How would you describe You? If you look up the word obsession, you’ll see this show. There was a time where if I wanted to know how popular I was, I’d have to go to the mall. You couldn’t go to an app and say, “I’ve got 10,000 likes.” It’s an interesting look at social media, and it’s a cautionary tale too. How does Dr. Nicky get involved? Beck’s a client. When Joe finds that out, he wants to see what therapy I’m giving her, because he’s a jealous guy. So he comes in as a patient under an assumed name. Fuller House has been picked up for season four. What’s the scoop? I’m guest-starring on a few episodes. This is a magical time for me. I don’t want to go and play a dad; I’m going to stay home and be one. [Son Billy was born in April.] You played drums and guitar with the Beach Boys for A Capitol Fourth. Will you be doing more dates? I’m always going out with them because, next to my son now, it’s the highlight of my life: just being able to play that wholesome, innocent, happy music that evokes that energy in people. You’ll see a 5-year-old and a 95-year-old in the audience, and I love that.