Login to unlock this video.
If you don't already have an account, sign up to enjoy more TVNZ content anytime, anywhere.
AO A woman walks into the station and confesses to killing someone; the team tries to unravel a bizarre case while dealing with the loss of a colleague.
Returning for a thrilling final season, your two favourite crime busting duo have a lot in store for you...
Titles, characters and all other elements are the trade marks and copyright of TVNZ or its licensors. All rights reserved. Further details available here.