Paul Sturgess played a tall white creature with a cloak, no eyes and a snout in It Takes You Away. His role was, however, cut from the final product.
Sturgess as the creature, posing with Jodie Whittaker as the Thirteenth Doctor, Mandip Gill as Yasmin Khan and Kevin Eldon as Ribbons
Sturgess is currently the tallest basketball player in the world, and in 2017, he became the UK's tallest man, after the death of fellow Doctor Who guest Neil Fingleton.