noon
He would probably have to waken her out of it , but he did n't want to do it too early . It took an effort to control his impatience , even though he knew the drug needed time in which to work . He finally decided on at least a minimum of an hour before he should try to disturb her . That would be noon -- twelve hours before destruction . One thing he should do was to get in touch with Professor-Commander Krafft . Maybe it was being defeatist , but he had to make sure that they had a way off this planet if the mission failed . Krafft had installed a relay radio that would forward calls from his personal set .