“Ten series!” says producer David Richardson. “We could never have imagined when we made The Mahogany Murderers for the Companion Chronicles that we’d clock up so many episodes with the wonderful Christopher and Trevor. And that’s all down to the enduring charm of both them as actors, and the characters as created by Robert Holmes.”

After returning from their voyages on the Fata Morgana in Series 9, Henry Gordon Jago (Christopher Benjamin) and Professor George Litefoot (Trevor Baxter) are back in London for four more cases of the unexplained, once again joined by loyal barmaid Ellie Higson (Lisa Bowerman) and the indomitable Inspector Quick (Conrad Asquith). Time Paradoxes, missing secrets and the detectives' biggest fan awaits in the tenth series based on the classic characters from Doctor Who: The Talons of Weng Chiang.

Co-starring alongside our seasoned series regulars is Toby Hadoke as Carruthers Summerton – Jago and Litefoot's biggest fan! Elsewhere, a strange package delivery leads the investigators to come across some familiar faces – their younger selves! Alex Lowe and Blake Ritson star as young Jago and Litefoot for a case that took place 30 years before the pair even met!

Other guest stars for the series include John Rowe, Rosanna Miles, Ewan Bailey, Tracy Wiles, Camilla Power and David Warner.

1: The Case of the Missing Gasogene By Simon Barnard & Paul Morris

Investigating the death of Sir Hartley Harecourt’s manservant, Jago and Litefoot are caught up in an intriguing locked-room mystery. It’s a mystery that involves strange experiments, mysterious scientific formulae, our heroes’ greatest admirer, and a missing soda siphon…

2: The Year of the Bat By Jonathan Morris

When a strange package is delivered to Professor Litefoot, he has no idea of the far-reaching implications. Soon Litefoot and Jago find themselves enmeshed in a series of events that began thirty years ago – events their younger selves have already been caught up in…

3: The Mourning After By James Goss

Litefoot is surprised to meet an old friend. But celebrations are rather muted as he and Ellie have just been to the funeral of Henry Gordon Jago. But is Jago really dead? Or has he somehow been transported into a nightmarish future? The truth is both elusive and deeply worrying…

4: The Museum of Curiosities By Justin Richards

At last Carruthers Summerton – the greatest admirer of Jago and Litefoot and their would-be biographer – gets to accompany his heroes on an investigation. But amongst the bizarre murders and strange clues lies a much deeper and far more dangerous mystery. Unsure who they can trust, Jago and Litefoot will find out the truth at the Museum of Curiosities…

Jago & Litefoot: Series 10 is released in October and is available to pre-order now.

The nine previous series are also available to order now, along with the original Companion Chronicle that reunited the detectives: Doctor Who: The Mahogany Murderers, and two special episodes exploring the pair's journeys with the Sixth Doctor: Doctor Who: Voyage to Venus and Doctor Who: Voyage to the New World.