Four women specialists in pattern recognition who were involved in 
cracking the Enigma Code in World War Two work together to solve murders
after being rebuffed by the police.
               
             
  Episode #     Prod #      Air Date 
_____ ______ ___________  ___________ ___________________________________________

• Season 1

1      1-01                06/Sep/12   Cracking a Killer's Code (1) 
2      1-02                13/Sep/12   Cracking a Killer's Code (2) 
3      1-03                20/Sep/12   Cracking a Killer's Code (3) 

• Season 2

4      2-01                06/Jan/14   Blood on Their Hands (1) 
5      2-02                13/Jan/14   Blood on Their Hands (2) 
6      2-03                20/Jan/14   Uncustomed Goods (1) 
7      2-04                27/Jan/14   Uncustomed Goods (2)