Law & Order: UK - Season 1 Episode 4 -

When a metal-detecting pensioner unearths a shallow grave by the side of the Thames, DS Ronnie Brooks and DS Matt Devlin are forced to reopen a contentious murder case. Their investigations into the case of Luke Slade threaten to unravel a conviction made by James Steel eight years ago, with questions over the handling of the prosecution, James' career is on the line.