This month marks the 40th anniversary of Doctor Who: The Talons of Weng-Chiang. Today we unveil the trailer for the next outing for those Investigators of the Infernal, Jago & Litefoot...

On TV screens in March 1977, Mr Jago met Professor Litefoot for the first time in Robert Holmes' superlative Talons of Weng-Chiang: time-travelling war lords, a homunculus from Peking, and a hugely charistmatic double-act at its heart. Forty years later, Christopher Benjamin and Trevor Baxter continue the gentlemens' adventures with Jago & Litefoot - Series 13 due for release in April, written by Paul Morris, Jonathan Barnes, Matthew Sweet, Justin Richards and directed by Lisa Bowerman. Today we're delighted to reveal the brand new trailer:

Someone from the future has arrived in Victorian London on the trail of a renegade… but that trail leads them to Henry Gordon Jago and Professor LItefoot.

So begins an adventure that will propel the Infernal Investigators into unknown territory, and an encounter with two people they should avoid at all costs.

Themselves.

April's Jago & Litefoot - Series 13 can be pre-ordered now for £25 on Download or £30 for a CD set purchase which also unlocks a digital version exclusive to your Big Finish account - these pre-order prices end when the set goes on general release at the end of May, going up by £5 on both formats - so get an order in today!

Fans who want to discover how Jago & Litefoot first returned to Big Finish should check out Doctor Who - The Companion Chronicles: The Mahogany Murderers which as our Listeners title for March is just £2.99 on Download...

Coming later this month to celebrate Jago & Litefoot's anniversary is the first in a two-part Doctor Who - Short Trips adventure, The Jago & Litefoot Revival written by Jonathan Barnes and read by both Christopher Benjamin and Trevor Baxter. This download-only format is especially perfect if you're using the free Big Finish download/playback app for Apple and Android devices: