Billie Piper's Doctor Who Return Wasn't the Original Ending

Collider reports that a change in Doctor Who's Season 15 finale came from showrunner Russell T Davies, who explains in his upcoming memoir why the episode ended with Billie Piper appearing as the Doctor's new form.

The finale aired May 31, 2025, and showed Ncuti Gatwa's Doctor regenerating into a figure that resembled Rose Tyler, Piper's character from the early 2000s. No official announcement or credit confirmed Piper's role, sparking questions about whether she would be the 16th Doctor.

According to Collider, an excerpt from Davies' memoir, The Queerest of Folk: A Life in Television, published by The Guardian, reveals the original ending was meant to be open-ended because Gatwa was leaving the show early. But the team worried about how children would interpret an open-ended regeneration.

"We can't transmit this. We need someone to step in."

Davies wrote that the edited version looked like the death of the show. So they approached Piper, who was available and gave "the fastest yes." Her appearance gave the Doctor someone to physically regenerate into.

The reaction worked. Two days after transmission, Davies told Collider, seasoned TV professionals were asking him about Piper. He said it made everyone pay attention to the show again.

What's next for Doctor Who

The BBC has launched a competitive tender process to find producers to continue the show. The target is a 2028 or 2029 release date, with pitches already submitted and a shortlist of producers to be interviewed in January 2027. A new production contract is expected by March 2027.

Doctor Who is available to stream on Disney+.

• BBC
• Billie Piper
• Disney
• Doctor Who
• Ncuti Gatwa
• Russell T Davies