Poirot has joined 'Doctor Who'.

David Suchet in Doctor Who

David Suchet in Doctor Who

David Suchet - who portrayed the popular detective in 'Agatha Christie's Poirot' from 1989 to 2013 - is set to play The Landlord in the 10th series of the BBC sci-fi show.

It's not yet known whether The Landlord will be a friend or enemy of the Time Lord but it's believed he'll shake things up for the time-travelling scientist and his team.

The 70-year-old star's signing comes just a few days after the show's director Andy Pryor revealed they are going to cast a disabled actor in next year's series.

He said at the time: "The area where I haven't pushed hard enough is disability.

"That's something I want to address in the 2017 series."

And he isn't the only one who wants to have a disabled character in the show as the head writer Steven Moffat, who will step down as producer next year, is also on board.

Andy's new plan comes just a few weeks after it was revealed that only black actresses were auditioned for the Doctor's (Peter Capaldi) new companion Bill (Pearl Mackie).

He said: "I wholeheartedly approved of the decision to only audition non-white actresses. You don't do it for the sake of it. You do it because it's the right thing to do. Most actors in this country are white. Unless you are conscious about not always going in that direction you're going to end up with the same cast all the time. And that's not OK.

"I always want to cast the best actors but I want the show to be interesting, to be attractive to a diverse audience and to reflect the world we live in."

Meanwhile, Michelle Gomez - who plays Missy, also known as The Doctor's nemesis The Master - recently admitted she's not sure if she will reprise her role.

She previously said: "I just don't know. I mean, I don't even know if she's coming back this season to be honest.

"As a freelancer which is what I am, I try to bag the next job, do it as well as I can and then move on to the next one."