Ania Sowinski

When an art dealer's wife is taken hostage at gunpoint, Luther leads a tense investigation. The hostage takers want payment in diamonds so, stalling for time, Luther substitutes a bag of replacement diamonds from the Serious Crime Unit's evidence safe. Luther and DCI Reed are on hand to arrest the gang members picking up the gems, but when everything starts to unravel Luther begins to suspect that even Reed has double-crossed him.

First part of a two-part story. The arrival of a package containing a Nazi dagger sparks an investigation into the unsolved murder of a Jewish girl in 1945.

Further horrific discoveries are made at the London house where the Nazi dagger was found.