Over the course of two years, filmmaker Jamie Roberts meets those spreading extremist Islamic fundamentalism in Britain, including a bouncy castle salesman who is now one of the world's most wanted men.
Abu Rumaysah
Jihadi Sid
Khuram Butt
Self
Jamie Roberts
Narrator
Mohammed Emwazi
Jihadi John
Mohammed Shamsuddin
Self
Abu Haleema
Self
Theresa May
Self
