Richard Franklin, who played UNIT captain Mike Yates in Doctor Who from 1971-74, reads Terrance Dicks’ 1985 novelisation of the 1971 serial The Mind of Evil for this new BBC Audio release.

Eminent scientist Emil Keller has developed a revolutionary new process for the treatment of hardened criminals. His invention, the Keller Machine, is being heralded as a major scientific breakthrough.

But Professor Keller is in actual fact the Master, and the Keller Machine is much more than a mere machine. Soon the Third Doctor, Jo Grant, the Brigadier and UNIT are involved in a bitter struggle with the Master, an alien mind parasite, and a diabolical scheme to plunge the world into a Third World War…

The talking book of The Mind of Evil is available now from BBC Audio, priced £20.

We’ve got FIVE copies of the CD to give away to readers. If you would like to be in with a chance of winning one, all you have to do is correctly answer this question:

Terms and Conditions: The competitions open on Thursday 6 April and close at midnight on Wednesday 3 May 2017. One entry per person. The competitions are not open to employees of Doctor Who Magazine or the printers, 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.