Messiah - Series 3 And 4

DCI Red Metcalfe's renowned ability to get under the skin and into the minds of deranged killers is put to the ultimate test in two cases of terrifying murders.
Messiah III: The Promise:
In a crumbling disused hospital, wounded guards and prisoners are recovering after a terrifying prison riot. As the hospital itself becomes a stalking ground for a brutal serial killer, DCI Metcalfe finds his team in disarray and a murderer who is always one step ahead.
Messiah IV: The Harrowing:
A series of bizarre and horrific killings are accompanied by the words 'Save me', written in the victim's blood. As the vicious murders spiral out of control, can Red and his team put aside their own emotional torment and find a method in the killer's madness?