What's in a name?
When it comes to David Ramsey's ex Army Special Forces character, there's a reason he's called "John Diggle".
David tells us that the surname Diggle is a homage to an important person behind the scenes.
"The creator of the show is Mr Diggle..." he says.
However, it turns out that there's a reason for the first name John, too.
To find out more, watch the video below: