Armed response officers join up with colleagues from the knife crime team to smoke out a lad who was seen brandishing a 12-inch blade on a residential estate. Meanwhile, several units hunt down a driver who's been running red lights, speeding at over 100mph and caused a crash while driving the wrong way on a dual carriageway

Officers join the National Police Air Service to stop two suspects in a car believed to be on cloned plates - but that doesn't prevent the driver taking the pursuit into fields

On the M62, police race to clear a crash scene after a car ploughs into a chemical tanker, sparking fears of an explosion. Elsewhere, a suspiciously honest provisional driver raises eyebrows, while in Beverley, cops track down a delivery driver they've dealt with before for driving while uninsured

There is an alarming report of thieves wielding machetes in order to steal the keys to a BMW in London and the chase spills onto Northamptonshire's patch and all units head to the M1. But just as the cops are about to pounce, the bad guys slip through a gap in traffic and escape on the hard shoulder. A motorbike proves nearly as hard to pin down for Locky, who chases it up and down the county in the dark

An altercation in a bar leads to a foot chase for officers through Gloucester city centre that is only ended by use of pepper spray, a handy tool for the cops if a calm and reasoned approach doesn't work. A 999 caller reports a burglar stealing radiators from unoccupied houses and hiding them in back gardens nearby

A scientist dies while hallucinating his home is on fire. Mulder reluctantly teams up with a new partner to investigate, and they discover the victim was involved with an experiment to create soldiers who did not need sleep. The killer is one of his test subjects, who has gained the ability to make nightmares real. Mulder meets the mysterious man who has been aiding his investigations. Tony Todd guest stars