Police Interceptors is back with unrestricted access to a new force: the elite crime-fighters of Northamptonshire Police. This all-action episode kicks off with interceptor Bertie tailing a fail-to-stop driver thrashing it at over a tonne. With speeds ramping up and the country roads narrowing, the pursuit is only going to end one way: the suspect stacks it at high speed and flips the car onto it's roof...