To celebrate the transmission of the Seventh Doctor and Klein trilogy on BBC Radio 4 Extra, Big Finish is providing a limited time offer on the stories. For this weekend, May 26 and 27, the three stories are available complete and uncut for just £9 each or £25 as a bundle, on CD and download. Just visit Big Finish Bargains - http://www.bigfinish.com/ranges/released/special-offers To order the bundle of all three, just click on the green 'subscribe' button.

In A Thousand Tiny Wings, the TARDIS arrives in 1950s Kenya during the Mau Mau uprising, and the Doctor again encounters Nazi scientist Elizabeth Klein.

In Klein’s Story/Survival of the Fittest, the secrets of Klein’s past are revealed, and a visit to an alien world sees an attempt to save an insect race from exctinction.

Finally, in The Architects of History, a new future is threatened by an attack by the alien Selachians…

To order, go to the Big Finish Bargains page, and for the three-release bundle, click on the green 'subscribe' button.

Sylvester McCoy stars as the Doctor, alongside Tracey Childs as Elizabeth Klein. They will be reunited in October for the Doctor Who - UNIT: Dominion box set, which is available for pre-order at a special offer price.