- Photon solar energy group is aiming to build a solar farm in Danebury. Blissfully unaware of the plan Andy and Lance are still looking for buried treasure - construction worker Andy, with Becky and their baby living with disapproving mother-in-law Veronica whilst Lance is sharing his flat with his messy, noisy teen-age…
- 本季共4集，每两集一个案子。 Hattie Morahan饰演的Alice曾经也是布莱切利的一员，现在她面临谋杀的指控，马上要面临绞刑，Jean找回Susan、Millie和Lucy帮助Alice洗清罪名，却揭开了更深的内幕。 Susan离开英国前往印度，开始全新的生活，Millie却因为做黑市交易陷入了巨大的麻烦，甚至会有性命之忧……
