Daniel Mays has admitted he appeared in Dr Who to impress his son.
The Ashes To Ashes star plays Alex, the father of George, a frightened little boy who is at the centre of Night Terrors, a new Doctor Who episode set tonight (Saturday).
Daniel revealed: "I have a five-year-old son, Mylo, who's a big Doctor Who fan. I think the quality of the show has got better and the calibre of guest actors they get in is of a high standard, but the key to the story for me was the relationship between this father and son. It's really quite touching and moving."
The Made In Dagenham star confessed he doesn't like watching himself but he will watch the episode with his son.
He said: "I must admit I'm not a great fan of watching myself back, but I'll watch it with Mylo.
"I think he'll really enjoy the episode and lots of his friends at school are huge Doctor Who fans. Matt signed some photos for them, which made their day. I think I was the best dad in the school that day!"