Line of Duty finale: 'H' actor reacts to their unmasking

Never has a letter in the alphabet caused such a stir. After years of dissecting and fan theories, the identity of "H" has finally been revealed.

BBC Breakfast asked Line of Duty’s Nigel Boyle how long he'd known he was the "fourth man", as well as getting viewers to record their live reactions to the big reveal.

Read more: Line of Duty finale lands record ratings