Dave and Alex respond to a report of a motorbike theft near Ilkeston and the officers hunt down a pack of suspects in an hour-long chase, which concludes with Derbyshire's first-ever use of a stinger to stop a motorbike. South-west of Derby, Karl is called to a serious accident involving a motorcyclist, with witnesses reporting seeing the biker overtaking moments before colliding with the back of a trailer. (Channel 5 reference S08E13)