My main criticism is quite simply that it isn't long enough or detailed enough. I would have loved to see more of everything: the building of the vessel, the engineering, the training, the first lift to orbit, preparations for departure, Venus Orbital Injection, everything. I would have liked to see more of the first leg, Venus to Earth, instead of zipping there like a n°10 corporation bus. In fact, I would have liked to see a series on the scale of Earth Story made of this, with a full hour dedicated to every planet and maybe another to the loop around the Sun. As it was, I was left hungry. On the other hand, I do understand budgets and viewers' attention-spans.<br /><br />Re the science: Let's be fair about the speed-of-light time-lag: they did mention at the beginning that there was a lag in conversations, but they let this evaporate once they reached the outer planets. Some kind of conversation had to be presented to the viewers, and we have to assume that the lag was edited out for the sake of palatability; so no complaints there. But zero for noisy spaceships. The only film in which spaceships make no noise was Kubrick's 2001, and even then he copped out by using the noise of the crew breathing in their helmets - which *was* pretty effective. I wish the makers of Space Odyssey had realized just how eerie the sight of vast rocket-motors blasting in absolute silence might be but alas, Pegasus lets out much the same roar as every other cardboard spaceship in every other cardboard SciFi film.<br /><br />But the rest of the science was excellent. No complaints there, in fact praise for bringing out the radiation problems as well as they did. I just hope that having done this film won't discourage the BBC from making a really detailed version, but I suppose that's not for next week or next year either...