Jemma Redgrave

Jemma Redgrave played Kate Stewart on TV in The Power of Three, The Day of the Doctor,   Death in Heaven, The Magician's Apprentice, The Zygon Invasion and The Zygon Inversion and on audio in UNIT: The New Series. She also voiced Lana Merrion in the Big Finish Doctor Who audio story Mistfall. She is the niece of Vanessa Redgrave.