Season 1, Episode 1:
An MI-5 source passes on information that 20 bombs have gone astray between Ireland and the UK. Within minutes, a car bomb explodes, instantly killing a female doctor and fatally injuring her daughter as they set off on the school run. On discovering the doctor and her husband are family planning doctors, MI-5 begin looking at the possibility of a pro-life terrorist.
Read a recap for this episode here.