As part of his chat to BBC America about Spies Of Warsaw David Tennant gave his thoughts on the reason that people love Doctor Who.
"Growing up in Scotland in the 1970s Doctor Who was just part of every day life, the show was absolutely ubiquitous. It touches people that show, it means more to people then sort of it necessarily should and that's lovely. It's lovely to be involved in something that touches people's lives in that way. It's a bit indefinable."
He adds "It's just got something about it, something special."
Watch what else David has to say on Doctor Who in the video below:
Thanks to BBC America