This weekend the Doctor Who YouTube channel will host a 20-hour livestream marathon of audio dramas from Big Finish celebrating their 20 years of Doctor Who on audio.

Starting at 12:00pm (UK time) on both Saturday 20th and Sunday 21st July, the official home of Doctor Who on YouTube will stream over 10 hours per day of Big Finish audio adventures. Fans will get a chance to listen to the first episodes of over 30 different stories including spin-offs and special releases.

There will be video appearances from plenty of the Doctor’s friends past and present plus exclusives extracts and debuts from upcoming releases from Big Finish Productions. As the stories are livestreamed on YouTube, fans will be able to join in the conversation via the live chat.

Also broadcast during the event will be the first episode of Doctor Who: The Legacy of Time - a special anniversary box set 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.

See the full list of episodes that will be livestreamed below. Each episode will be the first part of a story unless stated otherwise. Schedule may be subject to change.

SATURDAY (Starts at 12:00 UK)

The Sirens of Time - Part 1 starring Peter Davison, Colin Baker and Sylvester McCoy

starring Peter Davison, Colin Baker and Sylvester McCoy Spare Parts starring Peter Davison and Sarah Sutton

starring Peter Davison and Sarah Sutton The Marian Conspiracy starring Colin Baker and Maggie Stables

starring Colin Baker and Maggie Stables The Fires of Vulcan starring Sylvester McCoy and Bonnie Langford

starring Sylvester McCoy and Bonnie Langford The Chimes of Midnight starring Paul McGann and India Fisher

starring Paul McGann and India Fisher Energy of the Daleks starring Tom Baker and Louise Jameson

starring Tom Baker and Louise Jameson The New Adventures of Bernice Summerfield: The Revolution (from The New Adventures of Bernice Summerfield Volume 1) starring Lisa Bowerman and Sylvester McCoy

(from The New Adventures of Bernice Summerfield Volume 1) starring Lisa Bowerman and Sylvester McCoy Captain Jack: Wednesday for Beginners (from The Lives of Captain Jack Volume 1) starring John Barrowman and Camille Coduri

(from The Lives of Captain Jack Volume 1) starring John Barrowman and Camille Coduri Celestial Intervention (from Gallifrey: Time War 1) starring Lalla Ward and Seán Carlsen

(from Gallifrey: Time War 1) starring Lalla Ward and Seán Carlsen The Time War: The Starship of Theseus (from The Eighth Doctor: The Time War 1) starring Paul McGann and Rahkee Thakrar

(from The Eighth Doctor: The Time War 1) starring Paul McGann and Rahkee Thakrar The War Master: Beneath the Viscoid (from The War Master: Only the Good) starring Sir Derek Jacobi and Nicholas Briggs as the Daleks

(from The War Master: Only the Good) starring Sir Derek Jacobi and Nicholas Briggs as the Daleks Jenny - The Doctor’s Daughter: Stolen Goods (from Jenny - The Doctor’s Daughter) starring Georgia Tennant and Sean Biggerstaff

(from Jenny - The Doctor’s Daughter) starring Georgia Tennant and Sean Biggerstaff The Tenth Doctor Adventures: Cold Vengeance - Part 1 (from Doctor Who: The Tenth Doctor Adventures, Volume 2) starring David Tennant and Billie Piper

(from Doctor Who: The Tenth Doctor Adventures, Volume 2) starring David Tennant and Billie Piper The Sirens of Time - Part 2 starring Peter Davison, Colin Baker and Sylvester McCoy

SUNDAY (Starts at 12:00 UK)

The Sirens of Time - Part 3 starring Peter Davison, Colin Baker and Sylvester McCoy

starring Peter Davison, Colin Baker and Sylvester McCoy Blood of the Daleks starring Paul McGann and Sheridan Smith

starring Paul McGann and Sheridan Smith The Phoenicians (from The First Doctor Adventures Volume 3) starring David Bradley

(from The First Doctor Adventures Volume 3) starring David Bradley The Yes Men starring Anneke Wills and Frazer Hines

starring Anneke Wills and Frazer Hines The Conquest of Far (from the Third Doctor Adventures Volume 3) starring Tim Treloar and Katy Manning

(from the Third Doctor Adventures Volume 3) starring Tim Treloar and Katy Manning The Auntie Matter starring Tom Baker and Mary Tamm

starring Tom Baker and Mary Tamm Dalek Soul starring Peter Davison and Sarah Sutton

starring Peter Davison and Sarah Sutton Jubilee starring Colin Baker and Maggie Stables

starring Colin Baker and Maggie Stables Master starring Sylvester McCoy and Geoffrey Beevers

starring Sylvester McCoy and Geoffrey Beevers The Sirens of Time - Part 4 starring Peter Davison, Colin Baker and Sylvester McCoy

starring Peter Davison, Colin Baker and Sylvester McCoy Doom Coalition: The Eleven (from Doom Coalition 1) starring Paul McGann, Nicola Walker and Mark Bonnar

(from Doom Coalition 1) starring Paul McGann, Nicola Walker and Mark Bonnar The Assassination Games starring Sylvester McCoy and Sophie Aldred

starring Sylvester McCoy and Sophie Aldred The War Doctor: The Innocent (from The War Doctor: Only the Monstrous) starring Sir John Hurt

(from The War Doctor: Only the Monstrous) starring Sir John Hurt UNIT: Tidal Wave (from UNIT: Assembled) starring Jemma Redgrave, Ingrid Oliver and Katy Manning

(from UNIT: Assembled) starring Jemma Redgrave, Ingrid Oliver and Katy Manning The Diary of River Song: The Boundless Sea (from the Diary of River Song Series 1) starring Alex Kingston and Alexander Vlahos

(from the Diary of River Song Series 1) starring Alex Kingston and Alexander Vlahos The Legacy of Time starring Paul McGann, Alex Kingston and Lisa Bowerman

Charge your sonic screwdrivers and grab the popcorn! It’s going to be a blast.