Doctor.who.2005.s00e161.the.power.of.the.doctor... -

The Thirteenth Doctor's journey comes to a close not in the TARDIS, but atop a scenic cliff overlooking a sunrise.

: Disguised as Rasputin in 1916 Russia , the Master seeks to erase the Doctor from history by forcing her to regenerate into himself. Doctor.Who.2005.S00E161.The.Power.of.the.Doctor...

: In a first for the series, the Doctor regenerates back into a familiar face— David Tennant , returning as the Fourteenth Doctor —setting the stage for the 60th-anniversary specials. The Thirteenth Doctor's journey comes to a close

Farewell to the Thirteenth Doctor: A Look Back at "The Power of the Doctor" Farewell to the Thirteenth Doctor: A Look Back

: In a psychic liminal space, the Thirteenth Doctor meets versions of her former selves, including the First, Fifth, Sixth, Seventh, and Eighth Doctors .

"The Power of the Doctor" is more than just a goodbye; it is a celebration of the Doctor's true power: the ability to inspire, to build a "fam," and to face the future with open arms.

: While the Master manipulates the Doctor’s timeline, the Daleks attempt to trigger volcanic eruptions across Earth, and a Cyberman-controlled planet threatens the globe.