4-th episode of 7-th season "Doctor Who"

What "Doctor Who" 4-th episode about

Twenty-first century Earth suffers a slow invasion of millions of seemingly harmless black cubes. While the Doctor waits for something to happen, he moves in with the Ponds.

Episode number: 4

Episode name: "The Power of Three"

Episode release date: 22 september 2012 at 19:30

Status: aired