Season 1 Episode 11: Cornwall

"When a quantum terrorist attempts to change the past, the QIA are alerted to the infraction and usually have a considerable amount of time to plan an operation to prevent it. However, on rare occasions they are faced with a Code 11 – an infraction so close to the present day that they need to act immediately. But this Code 11 is not only urgent, but also highly personal to QIA Agent Sarah Cunnington. Who is targeting her, and why?"