Jemma Redgrave returns for the 50th Anniversary Special

The BBC have confirmed that actress Jemma Redgrave will return to Doctor Who for its 50th Anniversary Special, reprising her role as UNIT's Head of Scientific Research, Kate Stewart.

The announcement comes as filming resumes in London this week, with the crew spotted at The Tower of London this afternoon - the building was last seen in The Power Of Three as the exterior of UNIT Headquarters. Jenna-Louise Coleman was present at the location, along with actress Ingrid Oliver.