Counter terrorism policing and the terrifying work of the metropolitan police bomb disposal squad are the breath taking backdrop for new high octane thriller, trigger point'. '.strtoupper('s')tarring vicky mcclure and producer by jed mercurio.when a series of improvised explosive devices ied are found in the city, expo officer lana washington is pushed to breaking point dealing with them, as well as her feelings for her fellow officer nutkins and the growing suspicion that the bomber may be someone she knows.