This is the first of several episodes from my trip to Airbus Toulouse: we cover flight testing of the A350. We have two guests. First, we speak with Peter Chandler, a test pilot at Airbus, about envelope expansion, the relationship between simulation and the real airplane, and test flying in general. Our second guest is Pascal Verneau, a test flight engineer. We discuss his role in flight testing, as well as some special equipment installed in (some of) the testing aircraft.