Wave of Destruction (audio story)

 was the first story in the fifth series of the Fourth Doctor Adventures, produced by Big Finish Productions. It was written by Justin Richards and featured Tom Baker as the Fourth Doctor, Lalla Ward as Romana II and John Leeson as K9.

Publisher's summary
A modulated frequency wave cancellation signal isn't something that the Doctor and Romana expect to detect in 1960s London. But then they don't expect to find Professor Lanchester, the man who invented it, lying unconscious. Or MI5 investigating.

With the help of MI5 Agent Miller, Lanchester's daughter Jill, and his nephew a pirate radio DJ called Mark, the Doctor, Romana and K-9 investigate. They soon discover that there is more at risk than they imagined, and an alien invasion is about to begin.

Can the Doctor identify and defeat the aliens in time? Will Romana manage to find a recombinant transducer before it's too late? And how will K-9 cope with his new job?

Part one
to be added

Part two
to be added

Cast

 * The Doctor - Tom Baker
 * Romana - Lalla Ward
 * K9 - John Leeson
 * Mark Lanchaster - Karl Theobald
 * Barnaby Miller - Phil Mulryne
 * Jill - Alix Wilton Regan
 * Derek Fretus - John Banks

Continuity

 * K9 previously piloted the TARDIS to lead the Black Guardian on another wild goose chase across the universe. (AUDIO: The Auntie Matter)
 * The Doctor still has his etheric beam locator. (TV: Genesis of the Daleks, The Talons of Weng-Chiang)
 * Romana still has her sonic screwdriver. (TV: The Horns of Nimon)
 * The Doctor and K9 have previously encountered the Vardans. (AUDIO: The First Wave, The Locked Room, The British Invasion; TV: The Invasion of Time)
 * The Magpie Deluxe is on sale. (TV: The Idiot's Lantern, The Runaway Bride, The Sound of Drums; AUDIO: Hunters of Earth)
 * The Doctor reverses the polarity. (TV: The Five Doctors)
 * The Doctor offers to let the Vardans go if they leave Earth alone. (TV: The Christmas Invasion et all)
 * Miller says that he has never heard of UNIT, but the Doctor says he will. (TV: The Web of Fear, The Invasion)
 * The Tenth Doctor would later visit another 1960s pirate radio station. (AUDIO: Dead Air)