TV Doctor Who - Season 7 Episode 4 : The Power of Three Doctor Who - Season 7 Episode 4 : The Power of Three 7.576/10 by 3245 users The Doctor and the Ponds puzzle an unlikely invasion of Earth, as millions of sinister black cubes arrive overnight, almost like presents falling from the sky. But what are they, what’s inside them and most importantly, who sent them? With the international community at a loss, it’s left to the Doctor to unearth who is behind the mystery. Details Casts Posters Images Title Doctor Who - Season 7 Episode 4 : The Power of Three Alternative Titles Доктор Ху, 神秘博士, دكتور هو, Docteur Who, Dr Who, Doctor Who (2005-2022), 超時空奇俠, דוקטור הו, 닥터후, Doktor Hu, Доктор Что First Air Date 2005-03-26 Last Air Date 2021-12-05 Number of Episodes 153 Number of Seasons 13 Genres Action & Adventure, Drama, Sci-Fi & Fantasy, Networks BBC One, Casts Jodie Whittaker, Mandip Gill, John Bishop, Billie Piper Plot Keywords , The Doctor Jodie Whittaker Yasmin 'Yaz' Khan Mandip Gill Dan Lewis John Bishop Rose Tyler Billie Piper Episodes List Doctor Who Season 7 :Episode 1 Asylum of the Daleks Asylum of the Daleks 2012-09-01 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 2 Dinosaurs on a Spaceship Dinosaurs on a Spaceship 2012-09-08 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 3 A Town Called Mercy A Town Called Mercy 2012-09-15 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 4 The Power of Three The Power of Three 2012-09-22 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 5 The Angels Take Manhattan The Angels Take Manhattan 2012-09-29 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 6 The Bells of Saint John The Bells of Saint John 2013-03-30 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 7 The Rings of Akhaten The Rings of Akhaten 2013-04-06 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 8 Cold War Cold War 2013-04-13 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 9 Hide Hide 2013-04-20 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 10 Journey to the Centre of the TARDIS Journey to the Centre of the TARDIS 2013-04-27 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 11 The Crimson Horror The Crimson Horror 2013-05-04 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 12 Nightmare in Silver Nightmare in Silver 2013-05-11 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a... Doctor Who Season 7 :Episode 13 The Name of the Doctor The Name of the Doctor 2013-05-18 The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a...