I'd have liked just a tad more information in the speculative segment of the programme. Instead of simply saying that they could have bailed out at 40,000 ft, it would have been interesting to know exactly what the speed/altitude envelope for bailout was, and what factors affected those limitations. Presumably it was only possible once the Shuttle had finished re-entry, in which case it's surely irrelevant. It would also have been interesting to know how easily they could have reached that envelope with a modified re-entry profile, or how much longer the aircraft would have had to 'hold together' using the existing re-entry profile.