- Billie Piper has spoken about her "last-minute" appearance in the Doctor Who season 15 finale, where she seemingly replaced Ncuti Gatwa as the Doctor through regeneration.
- Piper described the filming as "very emotional" and noted the "cloak-and-dagger" secrecy surrounding her involvement.
- She expressed her deep affection for the show, saying she could not refuse the opportunity to return to the "Whoniverse".
- Piper previously played Rose Tyler, companion to the Ninth and Tenth Doctors, and returned for the 50th anniversary episode in 2013.
- Gatwa previously explained his departure from the programme was due to the role's demanding nature, calling his exit "bittersweet".
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