False Identity (2018)

S7E13 The Wrong Smell

Helen Flood and Firefighter Penny Morris set out for a hike in the mountains, while Firefighter Cridlington attempts to train Radar the Rescue Dog to roll over. As the fog thickens, Penny twists her ankle, leaving her and Helen disoriented and lost. Fortunately, Fireman Sam, Radar, and Tom Thomas arrive just in time to help them out of the predicament.