Paranoid

Now that the Ghost Detective has been unmasked, Alec and Nina trade favours for information, but fail to consider the deadly repercussions of their actions. Bobby and Linda come up against a cunning adversary in Dusseldorf, and a surprise ambush leads to a breakthrough in the case - but leaves lives hanging in the balance.

Lucy reveals a secret past which devastates Bobby, while police in Germany and the UK make a breakthrough involving drug trials.

The net closes in around Dr Crowley. Fresh testimony helps the investigation - but reveals a secret from Linda's past.

The search is on to find the missing suspect. Linda and Walti revisit an old case in an attempt to gain the upper hand over Waingrow. After weeks of speculation, the events surrounding Angela's murder are finally revealed.