Highway Cops

The rescue chopper is called upon when there's a crash on the rainy roads of the Southern Alps. An unlucky driver's Nissan has been damaged by both a rock and an axe. (S4, ep 7)

There's trouble for speeding tourists who take a corner way too fast, and also for a man who tries to cheat the registration system when he's caught out by his ex-wife. (S4, ep 8)

Near Dunedin, a driver claims to be sober despite having thrown up in his car. Also, a minivan ends up on its side and a biker gets schooled on the rules of the road. (S4, ep 9)

The final episode of the season comes with plenty of drama as a crash manages to knock out the power to all of Clyde. (S4, ep 10)