Harvey has started work at Science and Development (SAD). It's here he meets Diane from personnel who is conducting a fitness survey. They soon take a mutual interest in one another. Harvey also notices that his boss Dr Sapersteen is very edgy. The Minister is also visiting the good doctor and Harvey soon learns why. A destructive comet called Nemesis is heading straight for the earth. The comet cannot be stopped and The Minister, fearing chaos, has decided to keep it a secret. Harvey is told he cannot tell anyone which causes him some stress and even The Minister shows some signs. Harvey is not the only one in his family under some stress though. His mother has given up smoking and his brother is having a real tough time.