Theodosia’s shapeshifting shocked viewers, but fans of the books will recognize this ability and know it's likely to turn up in the next Dune movie.

Dune: Prophecy Episode 4 ends with a huge Face Dancer reveal, and it may have big ramifications for the rest of the story.

After episode 3 delved into the backstory of Valya (Emily Watson) and Tula (Olivia Williams) Harkonnen, episode 4 returned to the present day and saw the Sisterhood conspiring against the Emperor (Mark Strong), as well as attempting to decode the fear that has taken hold over the acolytes.

Dune: Prophecy episode 4 sees Theodosia turn into Griffin Harkonnen. Using info from the books, here's what we know about what she did.

Dune: Prophecy has dropped its fourth episode. It showcased numerous interesting turns from Tula’s attempt to revive Lila to the mystery around Desmond Hart’s bleeding scars. However, the most intriguing aspect was linked with the character of Theodosia played by Jade Anouka.