Episode 6 (S01E06)

After a head-on crash involving two cars, one driver flees the scene, abandoning his daughter and her boyfriend amidst the wreckage. PC Ian Cosgrove rushes to assist a stranded driver on the infamous Thelwall Viaduct, but heavy rain complicates his rescue efforts. Meanwhile, a well-meaning bystander finds his brand-new vehicle wrecked while trying to help another motorist in distress.