Louie’s fourth season premieres May 5, and now FX has released the first teaser for the long-awaited return. Warning to anyone sensitive to images about suicide: Don’t watch this. The clip is a shot of Louie C.K. swan-diving off the Brooklyn Bridge, and though he survives (unlike his bouquet of roses), it’s still a very jarring segment. Louie has always been a bleak and cynical show, and last season’s “Daddy’s Girlfriend Part 2” included Parker Posey standing on the edge of a building’s roof, but there are still those among us who might consider using suicidal imagery in a commercial to be in poor taste.