Marley is a cheeky Chihuahua who lives with three other dogs and his owner Charlotte. Marley might be small, but he has a big personality – and a sneaky habit - Marley likes to wee inside the house!

Charlotte's mum is convinced that Marley is the culprit, but Charlotte is less convinced as she's yet to see him in action - cue the Dogs: Their Secret Lives team and their surveillance cameras.

Will they catch this canine criminal in the act? Marley is causing some serious friction. He's ruining the furniture and Charlotte's relationship with her mum. After two years of taking the pee, it's now time to stop Marley's naughty ways. But can the team help stem the flow?