1. Conflagration in Bochum

In the first episode of the fourth season, the Bochum firefighters are called to a fire in an industrial area at a car scrap yard. The situation worsens dramatically because the fire spreads extremely quickly. This is fatal because there is a chemical factory next door. There is a risk of a serious explosion. A race against time begins and a lot of reinforcements are called in. Can the catastrophe still be averted?