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

: 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.

: The episode concludes with a "companion support group" featuring surprise appearances from Ian Chesterton (William Russell), Mel Bush (Bonnie Langford), and Jo Grant (Katy Manning). The End of an Era Doctor.Who.2005.S00E161.The.Power.of.the.Doctor...

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

: Tegan Jovanka (Janet Fielding) and Ace (Sophie Aldred) take center stage, helping UNIT's Kate Stewart defend Earth. Mel Bush (Bonnie Langford)

: Reflecting her playful and optimistic nature, Whittaker’s final line is a simple: "Right then, Doctor whoever-I'm-about-to-be... tag, you're it" .