All episodes for series 1 of The Bletchley Circle

S1 E1 · Cracking a Killer's Code - Part 1

Former code breaker Susan spots a pattern in a string of murders of missing girls.

S1 E2 · Cracking a Killer's Code - Part 2

Susan and her friends set a trap to catch the murderer, using Lucy as bait.

S1 E3 · Cracking a Killer's Code - Part 3

Susan and her allies attempt to confront the murderer.