Meryl Streep, Paul Rudd, and Jesse Williams Invade in the "OMITB" Season 3 Trailer

Season three will revolve around the mystery of who killed Ben Glenroy backstage at the Broadway show directed by Oliver and also starring Charles. What Ben's connection to the rest of the cast is, we don't know yet. The murder also takes place a year after the events of season two. Most of the new cast seem to be actors in the production who are suspects in the murder.