

What if Colombo had an ego and a death wish? Meet Britain's worst great detective.
DI Walter Gambon is a self-styled “Yoda of the force”, whose workload suddenly increases when he’s handed the cases of an officer who committed suicide by throwing himself under a Tube train. Or was he pushed? Gambon must work out whether his former colleague was murdered, while tracking down another officer who has gone so far undercover that nobody knows where he (or she) is.
Acting
Adrian Dunbar's magnificent wreck of a man
Writing
Lindelof-esque mystery box that the BBC never opened

Director
Damon Thomas
Trivia, insights & behind the scenes
This was intended as a series launch but BBC One never ordered episodes, leaving the undercover officer plot permanently unresolved. Adrian Dunbar later found success as Ted Hastings in Line of Duty — essentially Walter if he'd gotten therapy.
Written by Paul Abbott of Shameless fame, this represents the last gasp of that mid-2000s BBC 'damaged male antihero' wave that gave us Luther and Wallander before the algorithm took over.