And ALL cases are solved at some point. Nothing ever goes unresolved, unless it's a decades old murder case which requires the intervention of a weary detective with a personal interest thanks to the mysterious death of a family member years ago.
Mercs, Porsches and Jags and other sporty European cars can always be caught by yankee pick ups or big wallowing American USV's if driven by an American film Cop. Because 60 Mph is really fast.
At some point during a car chase, the chasing cop car will be required to mount the "sidewalk" and smash through hundreds of people either sitting in a cafe or buying groceries at a market stall.
And without exception, they will all successfully move (or dive) out of the way of the car travelling towards them at 50mph without incurring serious injury.
In UK police dramas, CCTV from any location will be in high definition, full colour, and focused on the exact spot at the exact time any given crime occurs, featuring a clear image of the villain's face, which will always be familiar to the Sun Hill beat regulars. And it will somehow follow him down the street as he makes his escape.
It will not be in time-lapse, black & white, and pointing in the other direction
A group of villains will never, ever attack a lone cop en masse, instead they will circle him and have a go one at a time, thus allowing him to pick them off one by one with some judicious karate kicks, until they're all on the ground.
When being chased on foot through a street/warehouse/anywhere in fact, a villian will always find a handy selection of marbles, basketballs, paint tins or other convenient devices to knock over behind him and slow his persuer temporarily.
They’re not very realistic. Most of the NYPD do not spend their time tearing around with the flashing lights on, most of it is spent parked outside the local 7 / 11 munching donuts and chatting up the women behind the counter.