When you consider that this film was made in 1968 without the benefits of CGi it is a true masterpiece. A vision of Arthur C Clarke brought to life by Stanley Kubrik, 2001: A Space Odessey was the SciFi film all others to come would be measured by. In hindsight, it is now a measure of how little we have progressed.
This scene is the culmination of a cat & mouse game between Dave, the mission captain and the HAL 9000, a sentient and now turned rogue, Ship's AI. Brilliant, if lengthy film.