The cast of 2013’s An Adventure in Space and Time star in this sequel to 1964’s race across an alien world, in The Keys of Marinus. David Bradley (the Doctor), Jemma Powell (Barbara), Jamie Glover (Ian) and Claudia Grant (Susan) are reunited as the very first TARDIS team.

It’s 100 years after the travellers’ first visit to Marinus and they are greeted as returning heroes. However, things aren’t right… they soon realise that the Conscience machine has been reactivated, removing free will from the populace. Could the Doctor’s old enemies the Daleks be cooking up some monstrous plan?

To find out, head to bigfinish.com and pre-order yourself a copy of this full-cast audio drama by prolific Doctor Who writer Jonathan Morris (£16.99 for CD and download, or £13.99 for just the download). Or to be in with a chance of winning one of FIVE copies, simply send us the answer to the question below.

TERMS AND CONDITIONS: The competitions are open from Thursday 8 January 2026 to Wednesday 4 February 2026. One entry per person. The competitions are not open to employees of Doctor Who Magazine or anyone else connected with DWM, the printers or their families. Winners will be the first correct entries drawn after the closing date. No purchase necessary. DWM will not enter into any correspondence. Winners’ names and county of residence will be available on doctorwhomagazine.com. Entrants under 16 years of age must have parental permission to enter. To read the BBC’s code of conduct for competitions and voting visit https://www.bbc.com/editorialguidelines/guidance/code-of-conduct. Prizes will be sent to winners as soon as possible. Big Finish downloads require winners to sign up to a free Big Finish account online.