To celebrate 20 years of Doctor Who on audio at Big Finish, the official Doctor Who YouTube channel will host a 20-hour weekend livestream marathon of their audio dramas.

Over two days on the 20th and 21st July, the official Doctor Who YouTube channel will broadcast more than 20 episodes of Big Finish audio adventures featuring David Tennant, Billie Piper, Alex Kingston, John Barrowman, Tom Baker, Peter Davison, Colin Baker, Sylvester McCoy, Paul McGann, David Bradley, Sophie Aldred, Katy Manning, Nicola Walker, Sir Derek Jacobi and many more.

There will be video appearances from many of the Doctor’s friends, past and present with stories, never-before-heard snippets and interviews.

As the stories are livestreamed on YouTube, fans will be able to join in the conversation via the live chat.

Big Finish Productions was first granted a licence to create Doctor Who adventures in audio format back in 1999. Its first production was Doctor Who: The Sirens of Time, starring Peter Davison, Colin Baker and Sylvester McCoy. The company has since expanded its ranges, producing and distributing over 300 hours of audio drama each year. To date, over 850 titles from Doctor Who and its various spin-offs have been released with more Doctor Who stories confirmed from Big Finish until at least 2025.

Also premiering during the event is the first episode of Doctor Who: The Legacy of Time – a special anniversary boxset release celebrating 20 years of Doctor Who at Big Finish. This first episode stars Paul McGann as the Eighth Doctor, Alex Kingston as Professor River Song and Lisa Bowerman as Professor Bernice Summerfield.

Doctor Who: The Legacy of Time will be available from Big Finish on download and also released in an eight-disc CD deluxe package set with a limited edition of 4,000 units.