The latest volume in this series from Big Finish comprises two four-part adventures for the Doctor and Leela.

The World Traders by Guy Adams is set in 21st-century London. The Doctor and Leela get involved with the mysterious Amapan Investments, a company that’s managed to become remarkably successful in a short amount of time. The Usurians have come to Earth. And they have big plans.

In The Day of the Comet by Jonathan Morris, the TARDIS brings the Doctor and Leela to the ruins of a once-great city racked by earthquakes. The planet is due to be destroyed by a comet in a year’s time and this ship is the only way off world. But there’s a far worse secret hidden behind the scenes…

The Fourth Doctor Adventures: Series 10 – Volume 1, starring Tom Baker and Louise Jameson, is available this month from bigfinish.com priced £24.99 on CD and £19.99 to download. We’ve got FIVE copies of the CD to give away. To have a go at winning one, answer the following question correctly:

TERMS AND CONDITIONS:

The competitions open on Thursday 7 January 2021 and close at 23.59 on Wednesday 3 February 2021. 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 will be available on request. 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. However, due to the Coronavirus lockdown restrictions there may be a delay in dispatching some items.