Steve's in Exeter with Razor, on the way to find a vandal who's been spotted on CCTV smashing car windows. When Steve, and a couple of local officers arrive, they find three youngsters lurking nearby. It's not certain that these are responsible, but they're definitely not cooperative. Being as there's CCTV available, a quick call is made back to CCTV Central to view footage, while it becomes fairly clear that one of the three is very drunk – and that proves his undoing when one of the others, tongue also loosened by alcohol, drops him right in it as they all show off for the camera. He really doesn't take at all kindly to being arrested, as only someone with a high blood alcohol content can, and the arrest reaches much the same proportion of aggro as that arrest of the drunk boy in series three, until they have to go one stage further and use CS.

Out and about with Mike and Chris, still in Exeter, waiting for a silver car thought to be involved with the drugs trade. They sit up and wait, along with Jim and Giles, for nearly an hour before the car finally moves. Following Giles's commentary, they wend their way through the streets to catch up with the Black ST and step in to undertake the stop. They extract three bemused looking occupants from Birmingham who are, apparently, on holiday. Interestingly, one of them paid £1,000 into a bank that very morning, which seems an odd thing to do on holiday. Further searching reveals a list of figures and various other bits and bobs which screech 'drug dealing' almost as loud as someone with a megaphone. One strip search later, a bag of heroin cut into deals is found. Presumably it was a working holiday, then.

Darryl and Murphy are in Crediton preparing to look for a missing dog-walker – where his radio won't pick up a signal. The guy is walking the dog for someone else, and neither have been seen for five hours. Finding them may be entertaining, as the dog apparently 'doesn't like' other male dogs and is almost certainly nowhere near as disciplined as Murphy. Matters are not improved when Darryl finds his mobile has almost run out of juice. It doesn't take long to find a likely candidate, but he's clearly rather the worse for wear, and doesn't seem to have a lead for his dog. For some reason he is determined that Murphy is his dog, rather than the canine lurking behind him – and then can't call his borrowed companion to him as he's so aggressive that he's scaring the poor creature. Darryl then has to step into 'Dog Borstal' mode to train the drunk bloke to call the dog to him – and even this proves pointless so the next option looks like being his grasper; until finally the bloke manages to snaffle the pooch and attach one of Darryl's spare leads. It's only at this point that they discover the reason why he couldn't find his own lead. It was hanging from his belt.

We now join the TAG, and Dan, buried in a balaclava, explains that they're about to execute a drugs warrant on a house in Exeter. The door puts up no resistance, being already open, and everyone in the house is swiftly detained. One of the people in the house doesn't seem able to appreciate that cuffing everyone up is standard procedure, and evidence that something is going on here is added to by someone else turning up at the door. Everyone who isn't carrying drugs is allowed to go, except the guy who arrived late. He drove there, and is disqualified. Then he admits he's after something illegal for some weekend party activity. As the search progresses, Vicky finds 26 wraps of something powdery, a wodge of cash in a plastic pot and dregs of amphetamine in a scrap of bin-bag. This is just the start, with Dave finding yet more stuff in a handbag lurking beneath a pile of washing, and John showing off a rather nasty looking machete ready and waiting to repel borders.

Back with Darryl, heading out of Exeter to a collision out in the countryside. Reports about the state of the driver are somewhat confused, and Darryl discovers a car that has flipped right over. It turns out that the Driver is actually pretty much fine (thanks to his seatbelt), even if his car isn't. It appears that, when he was pulling into a passing place, the driver's brakes failed and he ended up ramming into a verge and flipping. Recovery of the vehicle is reasonably swift, if noisy, but the most important concern of the driver after his car is back on its wheels is the safety of the quiche he was carrying – which appears to have survived without so much as shedding a crumb.

Giles and Roger are patrolling the A38, and are passed by a car which has some incredibly long planks passed through the passenger window to the back. As the planks are far longer than the car, they're sticking out to an alarming degree. It's phenomenally dangerous, so he is quickly pulled. He immediately offers to saw up the wood, and is reminded that, if he could have done that, he should have before he left. Amazingly, the driver doesn't seem to realise just how dangerous it was to carry a load which widened his car by what turns out to be nearly a metre and a half – once Mark has measured it out – until he is sobered up with a fine. They leave him parked in a layby, sawing up the planks like he should have in the first place.