The Entropy Composition (audio story)

The Entropy Composition was a 2010 Big Finish full-cast audio short story featuring the Fifth Doctor and Nyssa.

It was notable for being a rare example of a Big Finish audio which had been commissioned as a result of an open invitation for scripts. Writer Rick Briggs won out over about a thousand other submissions.

Publisher's summary
A lost prog rock symphony is unearthed from the vaults – with catastrophic consequences for the entire cosmos.

Cast

 * Fifth Doctor - Peter Davison
 * Nyssa - Sarah Sutton
 * Erisi - Andree Bernard
 * Naloom - Ian Brooker
 * Mrs Moloney - Joanna Munro
 * Geoff Cooper - James Fleet

Continuity

 * Mrs Moloney queries whether the Doctor is wearing a vegetable, to which he replies, "It's decorative" — thereby echoing the Tenth Doctor's assessment of the his fifth incarnation's celery. (DW: Time Crash)
 * Nyssa refers to "The Entropy Composition" as the "music of the spheres", giving a metatextual wink towards the mini-episode of the same name.
 * Nyssa is still thinking about her happy childhood on Traken. (BFA: The Demons of Red Lodge)