"This year, Coop goes through quite a depression," he says. "Which is sad for him. I feel bad. Some tragic things happen in his life, but Coop's [normally] so happy-go-lucky. I hate seeing him in such a slump, but hopefully he'll pull out of it. I'm shooting episode eight so I'm waiting for him to pull out of this funk."
If you haven't checked out 'Nurse Jackie' you should! You can watch it on Showtime - Peter is excellent in the show!