Officer Davis is interviewed by investigator Alan Chen.

Bodies are piling up, Davis is at the centre of it all, and her report has gone up the reporting line, right to the very top. We haven’t spent a lot of time on Davis so far, so while it’s good to have her as the main focus this week, it’s a shame that this half hour plays out like a clip show.

Most of Davis’ time is spent in an interrogation room and then cutting back to previously seen clips of her investigation. The only new material is her trip out to the Nevada Desert and the consequences of her discoveries.

Verdict: Great for those just jumping into the show or who need a reminder of the previous eight weeks’ story, but most regular viewers will see this as treading water when things should be cracking along. 5/10

Nick Joy