Jim Buchan and Jack Harvey were friends. But that was a long time ago. In Reichenbach Falls, the lives of these estranged men are thrown together again, then blown apart.
Wry and obsessive DI Buchan (Alec Newman, Angel) is a cop on the edge; suave and self-assured Jack Harvey (Alastair Mackenzie, Monarch Of The Glen) is a best-selling crime novelist with the world at his feet.
As Buchan probes a 100-year-old cold case, the investigation takes him into the dark Jekyll-and-Hyde underworld of Edinburgh and on a parallel journey into the Scottish capital's literary past that leads him to question the very nature of his own existence.
Written by James Mavor and based on an original idea by Ian Rankin, surprising one-off drama Reichenbach Falls reflects Rankin's fascination with his home town of Edinburgh and the legacy of a city which has produced so many of our literary classics, from Kidnapped to The 39 Steps, from Sherlock Holmes to The Prime Of Miss Jean Brodie.
The drama special, commissioned as part of BBC Four's fifth birthday celebrations in March 2007, ties together a complex and fascinating detective literary history with a contemporary, action-packed tale.