10th November 2019 10:00

Doug Chaney brings his old partner Christine Yarrow in on a new case. Unlike previous cases where he has just been asking for the brilliant yet frustrating mind to help this case has a personal connection to Christine.

A serial killer has killed four separate women in the space of 72 hours. each woman has had a smiley face and series of numbers carved in to their cheeks.

Can Christine crack the code and catch the killer before he kills again?