BBC One - Doctor Who, Series 7 Part 1, The Power of Three , The Power of Three: The First Look

Problem cubed?

The Power of Three

The Doctor, Amy and Rory face an unusual invasion...
The Power of Three

Jemma Redgrave (left) plays Kate Stewart.
The Power of Three

Amy, Kate and the Doctor square up to the problem...
The Power of Three

The Doctor and Amy.
The Power of Three

‘Dad, it’s not the fitting…’ Brian’s back!

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Doctor Who Series 7 Part 1, The Power of Three

4/5 The Doctor and the Ponds puzzle over an unlikely invasion of Earth.

First broadcast: 22 Sep 2012

Not currently available on BBC iPlayer

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