First broadcast 7th May 2009.
During a reconstruction of a knife crime for trainee police officers, one lecturer, Michael Shearer, accidentally kills another, Alistair Matheson.
Blythe Duff - DS Jackie Reid
John Michie - DI Robbie Ross
Alex Norton - DCI Matt Burke
Colin McCredie - DC Stuart Fraser
Katrina Bryan - Ellis Sinclair
Andrew Byatt - Shearer
William Armstrong - Parkes
Martin Haddow - Goldie
Margo Gunn - Pippa
John P. Arnold - Matheson (as John P Arnold)
Colin Harris - Eugene
Francesca Dymond - Doctor
