Mavor's screenplay, 'Reichenbach Falls', was based on Ian Rankin's short story 'The Acid Test'. It was commissioned as part of BBC Four's fifth birthday celebrations in March 2007. The television movie premiered on BBC Four on 1 March 2007. ‘Reichenbach Falls’ was a BBC Scotland co-production with BBC Four. The Director was John McKay and the Executive Producers were Richard Fell and Anne Mensah.