The team have their work cut out in this dramatic conclusion to the two-parter. Neville must solve a mystery from the past that unlocks the truth of who murdered the concert pianist and why. Help is at hand, though, with the return of a former sergeant.

A man confesses to murdering his boss despite being unable to remember what happened. Convinced that things aren't as simple as they seem, Neville determines to uncover the truth and unveil the real killer.