The final two rookie detectives are closing in on Charly Hendricks' killer. If they can they get a confession or find hard evidence of the murder's identity, they'll walk away with the £50,000 reward.
The two remaining teams focus down on their suspects, but as they close in on the truth, the race is on to find a vital piece of evidence that could reveal the motive for Charly Hendricks' murder.
The detectives are under huge pressure to nab Charly's killer. Was it Hamish in a jealous rage? Or is land agent Alicia not so sweet and innocent after all? The net begins to tighten.
A mysterious dinghy washes up on the beach as the teams are informed the island is a known drug smuggling route. It could be another motive for murder and may explain the appearance of the threatening Freddie Forrester.
Murder mystery with a twist - the investigators are members of the public, competing to find the killer and pocket themselves £50,000. The body of Charly Hendricks has been found at an old run-down property she was renting from the local pub landlord. It's up to four pairs of amateur sleuths to search the scene and unpick the clues, hoping to find a motive for the crime.