Videos have also been added, including an introduction to the episode by Karen Gillan and Arthur Darvill.
Introduction to the Power of Three (YouTube / BBC iPlayer)
Clip: Life with the Doctor was like this... (YouTube / BBC iPlayer)
Clip: Invasion of the Very Small Cubes. (YouTube / BBC iPlayer)
Clip: In the TARDIS. (YouTube / BBC iPlayer)
Plus, should you like to make your own cube to join in with the fun on Saturday ...