Zagreus (audio story)

 was the fiftieth monthly Doctor Who audio story produced by Big Finish Productions. To celebrate this story being Big Finish's fiftieth release and the 40th Anniversary, the cast includes every single performer of a Doctor Who companion and Doctor to have worked with Big Finish at the time of production. Most perform roles different from their usual ones. As a result this was the first audio story where Peter Davison, Colin Baker, Sylvester McCoy and Paul McGann all appear together.

Publisher's summary
FOUR DOCTORS - ONE DESTINY Zagreus sits inside your head.

Zagreus lives among the dead…

Zagreus sees you in your bed

And eats you when you're sleeping.

Plot
to be added

Cast

 * The Eighth Doctor / Zagreus - Paul McGann
 * The Doctor (disembodied voice) - Jon Pertwee
 * Charley Pollard - India Fisher
 * The Brigadier/The TARDIS - Nicholas Courtney

Charley and her mother (Projection)
 * Lady Louisa Pollard – Anneke Wills
 * The Cat - Conrad Westmaas
 * Receptionist – Stephen Perring
 * Miss Lime - Elisabeth Sladen

On Earth - Incidence of the Divergence (Projection)
 * Reverend Matthew Townsend – Peter Davison
 * Captain Neil McDonnell - Mark Strickson
 * Miss Foster – Sarah Sutton
 * Professor Stone – Nicola Bryant
 * Mary Elson - Caroline Morris

On Gallifrey - Rassilon's Foundry (Projection)
 * Lord Tepesh – Colin Baker
 * The Great Mother – Maggie Stables
 * Ouida – Nicola Bryant
 * Cassandra- Bonnie Langford
 * The Recorder - Robert Jezek

End of the Universe (Projection)
 * Captain Duck – Sophie Aldred
 * Walton Winkle (Uncle Winkie) – Sylvester McCoy
 * Sergeant Gazelle – Lisa Bowerman
 * Goldilocks – Bonnie Langford
 * Corporal Heron – Stephen Fewell

On Gallifrey
 * Romana – Lalla Ward
 * Rassilon - Don Warrington
 * K9 – John Leeson
 * Leela – Louise Jameson
 * Cardinal Braxiatel – Miles Richardson

Culture

 * Charley encounters a Jabberwock, and quotes long passages of Jabberwocky.
 * The background of Zagreus is explored.

Species

 * The Divergence are a race that Rassilon locked away.

Individuals

 * Romana and Leela meet for the first time.

Locations

 * Romana and Leela journey to the Dark Tower in the Death Zone on Gallifrey.

TARDIS

 * The TARDIS is jealous of the Doctor and Charley's friendship.

Timeline

 * When the TARDIS "disappears", K9 scans for its presence in the Humanian Era, Peon Era, Morestran Era and Sumaran Era.

Continuity

 * Zagreus was first mentioned in BFA: Project: Twilight.
 * Charley recognises Brigadier Lethbridge-Stewart from their encounter in Malebolgia in 2003. (BFA: Minuet in Hell)
 * When he is trying to remember the name of the TARDIS, the Doctor calls it Bessie. (DW: Doctor Who and the Silurians, et. al)
 * Ace read the copy of Through the Looking Glass in the the Doctor's TARDIS. (NA: Cat's Cradle: Time's Crucible)
 * The simulation depicting the 1950s shows Project Dionysus, strongly implying it is a project of The Forge, since Dr Stone used the phrase, "For King and Country."
 * The Brigadier mentions that "we're little more than a product of a lifetime's memories, Time Lords even more so." Which is similar to the expression the Doctor used on the Eye of Orion. (DW: The Five Doctors)
 * When the Doctor is looking for Charley, he say "Yssgaroth curse you." (NA: The Pit)
 * Charley mentions that the Doctor escaped from Colditz Castle in October 1944. (BFA: Colditz)
 * In her personal timeline, Leela's next encounter with the Doctor would occur in London in the 1890s during his sixth incarnation. (JAL: Chronoclasm to JAL: The Hourglass Killers) In the interim, however, she encountered an alternative version of the Sixth Doctor known as the Burner Doctor on the Gallifrey of an alternative timeline. (BFG: Disassembled)
 * Leela says she "knows all the words to 'Daisy, Daisy'." Presumably, she learned the song during her visit to the Palace Theatre in London in 1889. (DW: The Talons of Weng-Chiang)
 * The Doctor mentions a timeline where he stood on the planet Oblivion (DWM: Oblivion) and one where he plucked out one of his hearts (EDA: The Adventuress of Henrietta Street).
 * The Divergence may or may not be related to the Enemy. (EDA: Alien Bodies)
 * Reverend Townsend's successor as the Cardington airbase's chaplain was Simon Murchford, who decided to become an Anglican minister to assuage the survivor's guilt which he suffered after the crash of the British airship R101 on 5 October 1930. The R101 had been launched from Cardington. (BFA: Storm Warning, BFA: The Next Life)
 * The Doctor mentions that he has met Grigori Rasputin. He met him for the first time in Zarechny, Siberia in 1903 during his first incarnation in the company of his granddaughter Susan Foreman, Ian Chesterton and Barbara Wright. (CC: The Wanderer) Subsequently, during his third incarnation, he, Liz Shaw and Jo Grant became involved in the events surrounding Rasputin's murder in St. Petersburg in December 1916. (PDA: The Wages of Sin)
 * The Doctor claims that he was once accused of the assassination of U.S. President John F. Kennedy on 22 November 1963. During his ninth incarnation, he would be a witness to the assassination. (DW: Rose)

Timeline

 * Zagreus occurs immediately after BFA: Neverland
 * Zagreus occurs before BFA: Scherzo