Slow Horses Star Kadiff Kirwan Joins Doctor Who

Thursday, 20 March 2025 - Reported by Marcus

Doctor Who Season Two: Kadiff Kirwan (Credit: BBC Studios (Dan Fearon))

The BBC has announced that the actor Kadiff Kirwan will appear in the new series of Doctor Who.

Since shooting to stardom playing Aaron in hit comedy Chewing Gum, Kadiff Kirwan has gone on to star in hit series after hit series including Black Mirror, Fleabag, I May Destroy You, This Is Going to Hurt, and most recently Slow Horses.

Kirwan can also be spotted on the big screen, with film roles ranging from 2018’s Mary Queen of Scots to 2022’s My Policeman, and on the stage in the Pulitzer Prize winning play The Hot Wing King.

Now, Kirwan is set to blast off into the Whoniverse as he joins the Doctor (Ncuti Gatwa) and Belinda Chandra (Varada Sethu) for an intergalactic escapade in the upcoming second season of Doctor Who, launching on 12th April.

Kadiff Kirwan, said:

I feel elated to be joining the rich legacy of actors who have guest-starred in Doctor Who. Russell T Davies and Juno Dawson have truly outdone themselves with this episode in what I can only describe as an intergalactic gargantuan extravaganza. It’s packed with gravity-defying mastery beyond imagination, and being a part of it is an absolute dream. Strap in Whovians, this one is gonna rock your world!

Russell T Davies, Showrunner said:

We’re so lucky in Cardiff to open the doors to world-class talent, and it’s been a riot, getting to work with Kadiff. I’ve loved his work on TV, and stage for a long time, so when we realised he was available and happy to come on board, that was truly a great day in the office!

Doctor Who is produced by Bad Wolf with BBC Studios for the BBC and Disney Branded Television and will air on 12th April exclusively on BBC One and BBC iPlayer in the UK, and on Disney+ outside of the UK