Trigger Point: Season 1, Episode 4

1 - 4: Episode 4

Sonya manages to trace the chemical explosive HMX used by the bombers to a government lab at Porton Down, but runs up against a wall of silence when she pushes for more information. Lana demonstrates to Thom that the wiring within the devices shows evidence of advanced bomb-making skills, leading her to suspect members of her own team.