The Doctor is reuniting with his daughter in Doctor Who‘s new Big Finish epic.

Georgia Tennant will be reprising the role of Jenny, as she encounters the Fifth Doctor, played by Georgia’s real-life father Peter Davison.

Written by Matt Fitton, ‘Relative Time’ sees Jenny meeting an earlier regeneration of her father. Together, they must defeat a Time Lord named the Nine (John Heffernan).

“Disaster strikes inside the Time Vortex, throwing together the Fifth Doctor and his future daughter Jenny – and the Nine sees an opportunity to steal something huge,” the synopsis reads.

‘Relative Time’ is part of a huge box set titled The Legacy of Time – six hour-long stories with characters from the entire history of Doctor Who crossing paths.

“It was just an irresistible idea, the thought of airing father and daughter, playing father and daughter, in our massive 20th anniversary special,” producer David Richardson said. “And it’s great to have Jenny back again after the enormous success of her debut on audio.

“The Legacy of Time is quite possibly the biggest Doctor Who story we have ever told at Big Finish.”

Jenny featured in the 2008 Doctor Who episode ‘The Doctor’s Daughter’, starring David Tennant as the Tenth Doctor and Catherine Tate as companion Donna.

The Legacy of Time previously announced that Professor River Song (Alex Kingston) will be back, meeting her predecessor Professor Bernice Summerfield (Lisa Bowerman), while Kate Stewart (Jemma Redgrave) travels back in time to classic UNIT and meets the Third Doctor (voiced by Tim Treloar) and Jo Grant (Katy Manning).

Tom Baker, Peter Davison, Colin Baker, Paul McGann, and Sylvester McCoy also feature in the story.

The official synopsis for The Legacy of Time reads: “Time is collapsing. Incidents of temporal chaos and devastation are appearing throughout the many lives of the Doctor and his friends – fallout from one terrible disaster.

“The Doctor must save history itself – and he will need all the help he can get. The truth is revealed, and it will take more than one Doctor to save the day!”

The six stories making up the set are…

1. Lies in Ruins by James Goss

2. The Split Infinitive by John Dorney

3. The Sacrifice of Jo Grant by Guy Adams

4. Relative Time by Matt Fitton

5. The Avenues of Possibility by Jonny Morris

6. Collision Course by Guy Adams

Doctor Who: The Legacy of Time will be available from bigfinish.com on download and as a limited edition eight-disc CD set, with just 4,000 copies available. It’ll be released in July 2019.