Don't forget the performance of the Fireflash (as seen on first episode: 600 Pax; 250,000 ft; Mach 6 (which it reaches on climb) impessive even if the couldn' afford headsets and had huge handheld mics. Incidently; how old is Jeff Tracey - I always believed series was based around 2065 (ie 100 years in future when it was made) but Jeff is stated to have been one of the first men on the moon - an event in the foreseeable near future when it was made.