Dark Eyes 4

 was a full cast audio anthology released in 2015 by Big Finish Productions. It was the fourth and final release of the Dark Eyes audio series. It featured Paul McGann as the Eighth Doctor and Nicola Walker as Liv Chenka.

A trailer for the anthology was released.

Publisher's summary
4.1 A Life in the Day by John Dorney

The Doctor and Liv return to post-World War One London, where the Doctor meets Kitty Donaldson (Beth Chalmers), and Liv strikes a friendship with her brother Martin (Barnaby Kay). But what mysterious force is hunting them?

4.2 The Monster of Montmartre by Matt Fitton

The Doctor and Liv's investigations bring them to Paris, where a monster stalks the streets.

4.3 Master of the Daleks by John Dorney

The Master and the Dalek Time Controller have forged an alliance. History hangs in the balance, and this time the Doctor can't help...

4.4 Eye of Darkness by Matt Fitton

It's the endgame. Truths will be revealed, and a hero will make the ultimate sacrifice.

Starring

 * The Doctor - Paul McGann
 * Liv Chenka - Nicola Walker
 * - Alex Macqueen

Featured

 * Kitty Donaldson - Beth Chalmers
 * Martin Donaldson - Barnaby Kay
 * Adelaine Dutemps - Rachael Stirling
 * Georges Legrand - Blake Ritson
 * Christian Favreau - Alex Wyndham
 * The Daleks - Nicholas Briggs
 * The Sontarans - Dan Starkey
 * Mary - Sorcha Cusack
 * Anya - Susannah Harker
 * The Eminence - David Sibley