Jemma Redgrave

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