Actors say yes to Doctor Who for many different reasons – the fame, the money, the role, the show or, quite often, for their children. Hermione Norris, known for Cold Feet and Spooks, has revealed that she's in the latter camp.
Norris will guest star in series eight of Doctor Who, in an episode set in Lanzarote and written by Wallander's Peter Harness. It was a role that she was persuaded to take, though, by her 10 year-old son Wilf and 6-year-old daughter Hero.
"They are used to seeing me in all sorts of guises," she said. "I did an episode of Doctor Who, which I did for Wilf actually because I couldn't have turned down an episode of Doctor Who."
While Norris did say that she couldn't reveal any details of the adventure – "I think you have to sign the Official Secrets Act!" – she did have plenty of praise for Peter Capaldi's portrayal of the new 12th Doctor.
"He's a fantastic actor... and I'm sure he'll be very, very different [as the Doctor]," she told This Morning.
"He's extraordinary, Peter – just watching him I was interested to see what he would do. I'll be fascinated to see it and he's a very, very good actor so it'll be exciting I think."
Norris was announced as a guest star in May, when showrunner Steven Moffat said: "It's a testament to the quality of Peter Harness's intense and emotional script, that we've been able to attract an actress of the brilliance of Hermione Norris.
"And for the first time since 1984, the Doctor Who production team is heading to Lanzarote. The Doctor is returning to the scene of an old adventure – but there have been sinister changes since his last visit."
It is highly likely Moffat is referring to classic Doctor Who story Planet of Fire, which was set in Lanzarote and saw Peter Davison's Fifth Doctor take on his arch-nemesis the Master.
Doctor Who will return with series eight opener Deep Breath on 23rd August.