Meet Roscoe, Murphy and Sherlock, the firefighters' most trusted and hard-working companions. Working tirelessly alongside their human counterparts, Roscoe, Murphy and Sherlock brave the still-warm sites of recent fires as part of the London Fire Brigade's fire investigation team. Wearing custom-made boots for protection, they identify the cause of fires and a variety of substances such as petrol using their greatest tool - their keen sense of smell! Selected at an early age, living with their handlers and attending thousands incidents together over their careers, the canine team are truly man's best friend.