Legendary Northern Irish football manager Martin O'Neill makes an extraordinary cameo performance in Purity Unleashed, the latest release in The Sixth Doctor Adventures.

O’Neill, a former Nottingham Forest midfielder, as well as the hugely successful manager of Celtic and Leicester football clubs, pops up as theatre heckler Arthur Lee in Matthew Sweet’s tribute to 1930s musicals, Broadway Belongs To Me!

Colin Baker stars as the Sixth Doctor and Bonnie Langford is Melanie Bush in this and two other astonishing audio adventures which continue the ongoing Sixth Doctor Adventures story arc.

Producer Jacqueline Rayner said: “Many paths cross in the studios, but I don't think I've ever witnessed a cast so excited as when they encountered football legend Martin O'Neill! I think everyone involved was already a fan, and ended the day even bigger fans.

“I was listening in remotely, gutted not to be there, but Martin kindly signed an autograph for my son, with a lovely message. His small part in the play is the best cameo ever! If he ever wants to move on from football, there's most definitely a place for him in comedy!”

Doctor Who – The Sixth Doctor Adventures: Purity Unleashed is now available to own as a collector’s edition 3-disc CD box set (for just £19.99) or download only (for just £16.99), exclusively here.

Big Finish listeners who purchase this release will also receive a download of a brand-new bonus Sixth Doctor Interlude audiobook, The Doctor and His Amazing Technicolour Nightmare Coat, read by Rosie Baker.

Rosie Baker said: “It was such a treat bringing this brilliantly fun story to life and particularly cool for me to be able to briefly step into the Sixth Doctor’s boots!”

The story synopses for the latest Sixth Doctor Adventures box set are as follows:

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...

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...?

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.

Big Finish is currently operating a digital-first release schedule. The mail-out of collector’s edition CDs may be delayed due to factors beyond our control, but all purchases of this release unlock a digital copy that can be immediately downloaded or played on the Big Finish app from the release date.