The scene where the detectives are waiting to catch the killer was filmed on Buchanan Street, Glasgow. The steps featured are at the entrance to the Royal Concert Hall where you can see up Sauchiehall Street or down Buchanan Street depending on which way you are facing.
First appearance of Tamara Kennedy as Sheila Crombie.
Kate Donnelly and Gavin Mitchell appeared in BBC Scotland sitcom Still Game as series regulars Frances and Boabby respectively, while Colin McCredie and Paul Cunningham both guest starred as Gerry the butcher (McCredie) and Dean (Cunningham).