Jordan Moreau Barry Berkman is behind bars in the final trailer for HBO’s “Barry,” which is ending its acclaimed run after four seasons. Season 4 premieres on April 16. In the official trailer, we see Barry (Bill Hader) eating alone and losing his mind in prison. In the Season 3 finale, the police finally catch the professional assassin turned Hollywood actor…who turned back into an unhinged killer last season. “I’m really sorry. I didn’t think it would end up like this. I am a good person; that is who I am,” Barry tells himself, as he shouts alone in the prison yard, points at unseen objects and screams and slaps himself in a mirror.