The Screaming Skull (audio story)

 was the third full cast audio story in the The Worlds of Doctor Who audio anthology released in 2014 by Big Finish Productions.

Publisher's summary
Disgraced soldiers Ruth Matheson and Charlie Sato are called back into action by Captain Mike Yates, when the UNIT Vault is mysteriously locked down by a deadly force. Together they must infiltrate the Vault and get those trapped out alive. But what enemy are they facing?

Plot
to be added

Cast

 * Captain Ruth Matheson - Daphne Ashbrook
 * Warrant Officer Charlie Sato - Yee Jee Tso
 * Mike Yates - Richard Franklin
 * Mr Rees - Jamie Glover
 * Lieutenant Jane Lucas - Rachel Atkins
 * Soldier - Stephen Critchlow
 * Soldier - Rory Keenan
 * Terravore - Sinead Keenan

Continuity

 * Charlie and Ruth refer to once being under the control of (AUDIO: Mastermind), after which they were sent to Fortress Island, now acting as a retirement home for ex-UNIT operatives who posed a security risk (TV: The Sea Devils).
 * Charlie refers to Yates' subordination in his youth. (TV: Invasion of the Dinosaurs)
 * Yates, Charlie and Ruth must prove their identities with a DNA test. (AUDIO: Tales from the Vault)
 * Yates refers to the fact that Brigadier Lethbridge-Stewart once lent a Nestene energy unit to the National Space Museum. (TV: Terror of the Autons)
 * Yates mentions plastic daffodils (TV: Terror of the Autons) and the Devil's End incident (TV: The Dæmons).
 * C19's Black Vault was moved to the Angel of the North in the 1990s. (PROSE: The Scales of Injustice; AUDIO: Tales from the Vault)
 * The Vault contains a pipe organ salvaged from the priory that occupied the future site of UNIT HQ prior to being burned down in 1911. (TV: Pyramids of Mars)
 * Rees uses the damaged Terravore in the Vault to attack Charlie and Ruth. (AUDIO: Tales from the Vault) It was among the thousands of Terravores which invaded Earth and attacked the London Underground in 2010. (AUDIO: The Crimes of Thomas Brewster)
 * Charlie and Ruth hide from the Terravore in Diamond Jack's cabinet. (AUDIO: The Magician's Oath)
 * Ruth tells Charlie that Sir Toby Kinsella of the Counter-Measures team placed the Reesinger music box in storage in 1964 and it was given to UNIT in the mid 1970s. (AUDIO: The Reesinger Process)
 * Yates refers to Corporal Carol Bell. (TV: The Claws of Axos)
 * When Rees looks into Yates' mind, he sees the Brigadier, the Daemons (TV: The Dæmons), the Daleks (TV: Day of the Daleks), the Master (TV: Terror of the Autons, et. al), Karfel (TV: Timelash; PROSE: Speed of Flight), Hyde Park frozen in July (AUDIO: The Magician's Oath), stone circles in Scotland (AUDIO: Vengeance of the Stones), a shining blue crystal (TV: The Green Death), Operation Golden Age (TV: Invasion of the Dinosaurs), Yates' breakdown and rehabilitation (TV: Invasion of the Dinosaurs, Planet of the Spiders), Nest Cottage and Mrs. Wibbsey (AUDIO: Survivors in Space, et. al).
 * Charlie and Ruth listen to Henry Gordon Jago and Professor George Litefoot's phonograph recording about their encounter with Rees in the 1890s. (AUDIO: Mind Games)