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Story details and cover artwork are today revealed for the forthcoming audio box set, The Sixth Doctor Adventures: Purity Unleashed, due for release in May 2023 from Big Finish Productions.

Colin Baker (the Sixth Doctor) and Bonnie Langford (Melanie Bush) star in three full-cast audio adventures – following on from the chilling cliffhanger heard in the previous box set, Purity Undreamed.

Marine biologist Hebe Harrison (Ruth Madeley) has vanished from the timelines and the Doctor and Mel must find a way of getting their new friend back! But little do they realise what perils lie ahead – or who stands against them... Doctor Who – The Sixth Doctor Adventures: Purity Unleashed is now available to pre-order as a collector’s edition 3-disc CD box set (for just £19.99) or download only (for just £16.99), exclusively from the Big Finish website.

The three high-stakes stories in the box set are as follows:

Broadway Belongs To Me! by Matthew Sweet

The Doctor and Mel begin their search for Hebe in 1930s New York, where history is taking a dark turn all of its own. On Broadway, they discover a genuine aberration of the timestreams: Behold America! – a hot shoe show set in a future Fascist United States. Starring Melanie Bush. Opening tonight…

Purification by Chris Chapman

The Doctor and Mel follow the trail to a port in New Zealand, 1910. A ship is being prepared for a journey to Antarctica and the Doctor realises that this is Captain Scott's Terra Nova expedition. But this is merely the beginning of an intricate scheme to rewrite the future of humanity.

Time-Burst by Ian Potter

Tracking the anomaly that erased Hebe from history, the Doctor and Mel find an instability in Sheffield, 1864. Who is Mrs Virtue, the mysterious owner of the new steelworks? And can the Doctor untwist history before a natural disaster washes them all away…?

Script Editor Robert Valentine said: “Following the cliffhanger at the end of Chronomancer (the finale of Purity Undreamed), the Doctor and Mel know something terrible has happened to Hebe, but the full scope and horror of it is yet to hit them. In this set, they're going to discover just how much danger history and the human race is in, and there's very little time to stop it.”

Big Finish listeners can save money by purchasing this box set as part of the 14-release Classic Doctors Bundle for £274 (collector’s edition CD box set + download) or £237 (download only). A 12-release bundle is also available from £198.

Alternatively, both 2023 releases in The Sixth Doctor Adventures range can be pre-ordered together for just £38 (collector’s edition CD box set + download) or £33 (download only). All the above prices include the special pre-order discount and are subject to change after general release.

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