First broadcast 15th October 2012.

The team reopen the murder of East German refugee Max Klein, whose last words were 'Blue Flower'.

Alun Armstrong ... Brian Lane
Amanda Redman ... Det.Supt.Sandra Pullman
Dennis Waterman ... Gerry Standing
Denis Lawson ... Steve McAndrew
Anthony Calf ... DAC Robert Strickland
Edward Baker-Duly ... Max Klein
Elizabeth Berrington ... Grace Cusack
Alex Blake ... Paul Armitage
Aislinn Sands ... Alicia Frei
Jordan Long ... Corey Murgins
Nicholas Burns ... DCI Rosser
Kate Bracken ... Mia Adler
Roger Evans ... Damon Rapley