Kate Aurthur editor In spring 2020, during the earliest phase of the pandemic, production on Season 3 of “Barry” was shut down before it could even begin. But co-creators Bill Hader and Alec Berg — along with the writing staff of the dark HBO comedy — would soon put that time to good use. They wrote the fourth season of “Barry,” and then went back and rewrote the show’s third, which still hadn’t started filming. As Hader and Berg wrote Season 4, they started to realize that “a very clear ending presented itself,” Hader told Variety in an interview last week. On April 16, the eight-episode final season of “Barry” will premiere — and Variety can exclusively reveal that date, as well as unveil its first teaser and first look.