Star Trek Discovery - An Alien Assembly - Promo Trailer HD - It's not easy getting a large gathering of aliens together, but the Federation assembly in "But To Connect..." (Season 4, Episode 7) is proof it's possible. Stars Sonequa Martin-Green (Captain Burnham) and David Ajala (Cleveland "Book" Booker), as well as Executive Producer Michelle Paradise and Costume Designer Gersha Phillips, detail the work that went into making this special scene. Stream Season 4 of Star Trek: Discovery, exclusively in the U.S. on Paramount+.