The filming of Marvel's newest Netflix series, The Defenders, is underway. It will act as a Avengers-level team-up series, featuring Daredevil, Jessica Jones, Luke Cage, and Iron Fist. Sigourney Weaver joins the cast as the villain of the series. She was seen in one of the first Defenders photos - released in the last couple of weeks - but a new collection of set photos containing her character has surfaced online.