Emily Watson as Valya Harkonnen in "Dune: Prophecy," and Timothee Chalamet as Paul Atreides in "Dune."Attila Szvacsek/HBO/Warner Bros. Pictures"Dune: Prophecy" is the prequel TV series to Denis Villeneuve's "Dune" movies.It also touches on a key event in the "Dune" universe: the Butlerian Jihad.Here's what to know about the "Dune" timeline."Dune: Prophecy" is HBO's prequel TV series to the critically acclaimed "Dune" movies directed by Denis Villeneuve.However, it's completely separate from the films, so don't expect to see Paul Atreides (Timothée Chalamet) or Chani (Zendaya) pop up for a cameo.It mainly follows Valya Harkonnen (Emily Watson) and her sister, Tula Harkonnen (Olivia Williams) as they work to establish the Sisterhood as an influential group that would eventually become the sect called the Bene Gesserit by Paul Atreides' time."Dune: Prophecy" is Warner Bros.' latest move to expand the "Dune" franchise, which has already grossed over $1 billion at the global box office.