Devices And Desires (6) - S6.E6

Caroline Amphlett's true purpose in working at the nuclear plant is revealed and Dalgliesh confers with the Security Service on the next steps. It is not clear however who it is that rammed her boat. Chief Inspector Rickards is ready to close the Robarts murder case as unsolved but Dalgliesh urges him to continue and provides his own profile of the killer.