Extremely Dangerous is a 1999 four-part drama serial for ITV starring Sean Bean. Synopsis Neil Byrne, an ex-National Criminal Intelligence Service undercover agent convicted of the brutal murder of his wife and child who goes on the run to try and clear his name. He sets out to follow up a strange clue sent to him in prison. The boss of a local crime syndicate, a former associate, hears of his escape and sends out the word to bring him in. On the run from the police and disowned by his NCIS colleagues, he is faced with the fact that he may be guilty. Cast Sean Bean as Neil Byrne Juliet Aubrey as Annie Antony Booth as Frank Palmer Ralph Brown as Joe Connor Sean Gallagher as DI Danny Ford Alex Norton as DCS Wallace External links 1999 British television series debuts 1999 British television series endings 1990s British drama television series British thriller television series ITV television dramas Television series by ITV Studios 1990s British television miniseries English-language television shows Television shows set in Hertfordshire