> Donate to Children in Need here.

Watch the clip, in which the Doctor meets a familiar face whilst investigating strange occurrences at an art gallery…

‘The Day of the Doctor’ airs at 7.50pm on Saturday 23 November on BBC One.

> Find out all the latest info on ‘The Day of the Doctor’ in our news summary.

The official synopsis for ‘The Day of the Doctor’ reads: “In 2013, something terrible is awakening in London’s National Gallery; in 1562, a murderous plot is afoot in Elizabethan England; and somewhere in space an ancient battle reaches its devastating conclusion. All of reality is at stake as the Doctor’s own dangerous past comes back to haunt him.”

> Order the 50th anniversary special on DVD on Amazon.

> Order the 50th anniversary special on Blu-ray on Amazon.

Are you looking forward to ‘The Day of the Doctor’? Let us know below…