: 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
: Tegan Jovanka (Janet Fielding) and Ace (Sophie Aldred) take center stage, helping UNIT's Kate Stewart defend Earth. 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 . : The episode concludes with a "companion support
Farewell to the Thirteenth Doctor: A Look Back at "The Power of the Doctor" Mel Bush (Bonnie Langford)
True to its status as a centenary special, the episode is packed with :