Rent Midsomer Murders: Series 10: Dance with the Dead (2006)

Young lovers Simon Bright and Laura Sharp are kissing in the backseat of a Humber car in a disused hanger. The next morning Simon's body is discovered there by Frances Kirby during her morning jog. There is no sign of Laura. Barnaby suspects that Simon may have been involved in a suicide pact, however the evidence tells a different story.