Doctor vs Companion?

Most of the time, when the Doctor invites someone onboard the TARDIS, their bond only grows with each adventure. But sometimes, the personalities end up clashing, with severe consequences. 

Duty of Care by Christian Markham, the fifth episode of the audio drama miniseries Doctor Who – The Twelfth Doctor Adventures: Run Fast, Be Kind, follows on from the dramatic ending of last week’s instalment, Wings of Steel. Ash (Gwithian Evans) has reached the limit of his forgiveness, and his actions have made the Doctor (Jon Culshaw) furious. 

And as this conflict plays out between them, the Time Lord has another problem – a killer is on the hunt, eliminating villains who the Doctor had shown mercy to. But whose side will Ash take? 

Doctor Who – The Twelfth Doctor Adventures: Duty of Care is available to download now for purchasers of the Run Fast, Be Kind six-episode series bundle, which is available for just £43.99, exclusively here. Customers will gain access to the weekly episodic downloads, as well as the box set as a single download to own (once all episodes have been released). 

The Doctor doesn’t kill. Not intentionally. Even his worst enemies are offered mercy. Go up against the Doctor, and while your plan will be ruined, there’s a chance you’ll live. 

Someone doesn’t agree with that. Someone’s travelling across all of time and space putting that right. Someone’s killing all the villains who survived the Doctor. 

This episode guest stars Gemma Knight Jones (recently seen in TV crime drama MobLand) as Amaya Aphra and Doña Croll as Nne/Dara Aphra. 

Lead actor Jon Culshaw said: “This story is so brilliantly written by Christian Markham. There’s such an obvious love for this era and all the different layers that that can present you with all the different juxtapositions and moral questions of when Doctor Who digs deep. And so many huge moral issues that these speeches really tore into.” 

Writer Christian Markham said: “The Twelfth Doctor is my Doctor. When I think Doctor Who, it’s his voice that I hear, and Jon has captured that voice so earnestly. Throw Gwithian into the mix as Ash, and you’ve got an immediately iconic TARDIS team. A team I’ve had great fun putting through the wringer. 

“Duty of Care is a story that really challenges the core premise of the Doctor-companion relationship. We’re holding a mirror up to both the Doctor and Ash and asking if they truly like what they see reflected back, both of themselves and each other?” 

The Twelfth Doctor Adventures reaches its universe-shaking conclusion next week with The Second Death of the Daleks, which returns to the events of the series’ first episode, with a crucial difference – the Eternal Dalek has arrived at the end of the universe! 

The complete six-episode series Doctor Who – The Twelfth Doctor Adventures: Run Fast, Be Kind is now available to purchase as a bundle for just £43.99, exclusively from www.bigfinish.com. Customers will gain access to the weekly episodic downloads, as well as the box set as a single download to own (once all episodes have been released). 

All the above prices (including pre-order and multibuy bundle discounts) are fixed for a limited time only and guaranteed no later than 31 August 2026.