From Darkness 1x4 - Series 1, Episode 4

Claire's confession about their shared tragedy sends Johnreeling, and both crumble in the aftermath of a disastrousattempt to nail the prime suspect. When John is suspended fromduty, Claire with her direct connection to one of the killersmust put aside her guilt and fight to prevent another murder.DSI Lola Keir takes the investigation back to square one;Claire exploits a suspect's obsession; and John risksprofessional annihilation in the race to catch a killer. ForClaire, the final confrontation will test her emotions beyondanything she's endured so far. As she finally confronts her ownrole in the crimes, will she finally put an end to thedarkness or has the true horror only just begun?.