Traffic Officers McKirdy and Singh discover the journey to true love can be a rocky road; the Queen of Chat, Lorraine Kelly finds out the law is King; and rural coppers call for back up from Mother Nature.

PC Hugh McKirdy finds himself at a very personal crossroads in his life as he prepares to pop the question to girlfriend, Moira. His grand plans to surprise her with a little help from PC Surjit Singh starts off on a high but hits the skids.

Plain clothes police officers DC Megan Squire and DC Andrea McGill follow up a complaint of cyber bullying which leads them to the door of TV favourite Lorraine Kelly. The detectives need to see past Lorraine's national treasure status and uncover any possible criminality and it's not long before the TV star is bang to rights.

PC Charlie McIntosh and PC Jane MacKay use the warm weather to tan a criminal seeking refuge in a greenhouse. Thankfully Mother Nature - and sunny Scottish weather - helps sweat him out.

Elsewhere, Chief Commissioner Cameron Miekelson gets high on his own supply; Sgt Karen Ann Millar is left speechless by Bobby's artistic antics; and PC Jack McLaren and PC Sarah Fletcher are rattled when a snake escapes at a children's party.