Complex sentence: "Till Death Do Us Part" is the twentieth episode of the seventh season and the series finale of "Pretty Little Liars", and the show's 160th episode, which premiered on the Freeform network in the United States on June 27,2017.
Split into simpler sentences: Till Death Do Us Part is the twentieth episode of the seventh season and the series finale of "Pretty Little Liars". It premiered on the Freeform network in the United States on June 27,2017.