As C Flight puzzle over how to protect reconnaissance aircraft from the Germans, Triggers is astonished to be recalled to Britain. He finds he has been seconded as an advisor and test pilot at the factory which is to build a new fighter - the factory owned by Triggers’ own father. The initial signs are good: the new "Viper" has a better rate of climb and will be equipped with a forward-mounted machine gun, but Triggers has concerns. His relationship with his father is fraught, and he is annoyed that Mr Triggers wants to press ahead with manufacturing the plane in bulk before resolving issues such as the purchase of a suitable engine from Spain. Following a test flight, he insists the design be amended before putting the prototype into production to make it safe enough for the average pilot to fly. In an attempt to prove that the "Viper" can be handled by the average pilot, the designer Tony Snow takes it for a further test flight. The plane crashes in flames, and Snow is killed. Triggers' father still wants him to remain at home to take charge of the factory he will one day inherit. Triggers, who is uninterested in the business, applies to return to France and is posted back to C Flight where his pilots are still unsuccessfully trying to shoot down the enemy's Eindeckers. (thetvdb.com)