Every day this week, Big Finish is celebrating its unforgettable crossover adventure The Worlds of Big Finish, with special offers featuring the cast of this celebratory release! Pick up the story today for only £20 on CD or £15 to download and check back everyday for a new round of offers!

From beyond time, space and rational thought, Iris Wildthyme (Katy Manning) is the multiverse's resident trans-temporal adventuress – if the multiverse likes it or not! Whether she's gate-crashing the Doctor's latest adventure, or having a G&T in her local with her very best friend (who happens to be sentient stuffed toy), Iris is always ready to battle the forces of evil and grab a quick kebab afterwards. Today you can save on all of Iris' Big Finish appearances, including:

• Iris Wildthyme: Wildthyme at Large by Paul Magrs for £5 on CD (does not include a digital download)

• Iris Wildthyme: The Devil in Ms Wildthyme by Stephen Cole for £5 on CD (does not include a digital download.

• Iris Wildthyme: The Sound of Fear by Mark Michalowski for £5 on CD or £3 to download.

• Iris Wildthyme: The Land of Wonder by Paul Magrs for £5 on CD or £3 to download.

• Iris Wildthyme: The Two Irises by Simon Guerrier for £5 on CD or £3 to download.

• Iris Wildthyme: The Panda Invasion by Mark Magrs for £5 on CD or £3 to download.

• Iris Wildthyme: Series 2 Box-Set (which collects The Sound of Fear, The Land of Wonder, The Two Irises and The Panda Invasion) for £20 on CD or £15 to download.

• Iris Wildthyme: The Claws of Santa by Cavan Scott and Mark Wright for £5 on CD or £3 to download.

• Iris Wildthyme: Series 3 Box-Set, featuring stories by Cavan Scott, Guy Adams and George Mann, for £15 on CD or £10 to download.

• Iris Wildthyme: Series 4 Box-Set, featuring stories by Cavan Scott, Mark Wright and David Bryher, for £15 on CD or £10 to download.

• Iris Wildthyme: Wildthyme Reloaded, featuring stories by James Goss, Nick Campbell, Roy Gill, Mark B. Oliver, Hamish Steele, Cavan Scott, Scott Handcock and Paul Magrs, for £20 on CD or £18 to download.

• Doctor Who: The Wormery by Stephen Cole and Paul Magrs for £5 on CD or £3 to download.

• Doctor Who – The Companion Chronicles: Find and Replace by Paul Magrs for £5 on CD or £3 to download.

• Doctor Who – The Companion Chronicles: The Elixir of Doom by Paul Magrs for £5 on CD or £3 to download.

• Doctor Who Excelis Dawns by Paul Magrs for £5 on CD or £3 to download.

• Bernice Summerfield: The Plague Herds of Excelis by Stephen Cole for £3 on CD (does not include a digital download).

You can pick up all of the titles in today's offers in the Worlds of Big Finish – Iris Wildthyme Complete Collection 2016 bundle, available for £105 on CD and £70 to download, with free UK postage. The bundle also includes a download of Bernice Summerfield: Many Happy Returns, where Iris gatecrashes a very special birthday party! Bundles collected by series are also available.

These offers must end noon Monday June 27th, so order now!

We may not ever be able to understand everything about Iris (or even want to understand) but everything we do know is explained in our Complete Guide now live on the Big Finish website. Click here to enjoy a crash-course (emphasis on crash) on the multiverse's most unwanted saviour.

Remember to check back tomorrow for another set of offers from The Worlds of Big Finish.