2 Doctor Who Series 7 Episode 4: ‘The Power of Three’ Trailers

Watch two new trailers for ‘Doctor Who;The Power Of Three,’ where The Doctor and the Ponds puzzle over an unlikely invasion of Earth, as millions of sinister black cubes arrive overnight, plus we see a return of UNIT!

‘Doctor Who’ Series 7 Episode 4: ‘The Power of Three’ airs on BBC One on 22 September at 7.30pm.

Watch the trailers below…