Editing HAL 9000 (section)

===''2010: Odyssey Two'' (novel) and ''2010: The Year We Make Contact'' (film)===
In the 1982 novel ''[[2010: Odyssey Two]]'' written by Clarke, HAL is restarted by his creator, Dr. Chandra, who arrives on the Soviet spaceship ''Leonov''.

{{Anchor|SAL 9000}}Prior to leaving Earth, Dr. Chandra has also had a discussion with HAL's twin, SAL 9000. Like HAL, SAL was created by Dr. Chandra. Whereas HAL was characterized as being "male", SAL is characterized as being "female" (voiced by [[Candice Bergen]] in the film) and is represented by a blue camera eye instead of a red one.

Dr. Chandra discovers that HAL's crisis was caused by a programming contradiction: he was constructed for "the accurate processing of information without distortion or concealment", yet his orders, directly from Dr. Heywood Floyd at the National Council on Astronautics, required him to keep the discovery of the [[Monolith (Space Odyssey)|Monolith]] TMA-1 a secret for reasons of [[national security]]. This contradiction created a "Hofstadter-Moebius loop", reducing HAL to [[paranoia]]. Therefore, HAL made the decision to kill the crew, thereby allowing him to obey both his hardwired instructions to report data truthfully and in full, and his orders to keep the monolith a secret. In essence: if the crew were dead, he would no longer have to keep the information secret.

The alien intelligence initiates a [[terraforming]] scheme, placing the ''Leonov'', and everybody in it, in danger. Its human crew devises an escape plan which unfortunately requires leaving the ''Discovery'' and HAL behind to be destroyed. Dr. Chandra explains the danger, and HAL willingly sacrifices himself so that the astronauts may escape safely. In the moment of his destruction the monolith-makers transform HAL into a [[Incorporeality|non-corporeal]] being so that David Bowman's avatar may have a companion.

The details in the novel and the 1984 film ''[[2010: The Year We Make Contact]]'' are nominally the same, with a few exceptions. First, in contradiction to the book (and events described in both book and film versions of ''2001: A Space Odyssey''), Heywood Floyd is absolved of responsibility for HAL's condition; it is asserted that the decision to program HAL with information concerning TMA-1 came directly from the White House.  In the film, HAL functions normally after being reactivated, while in the book it is revealed that his mind was damaged during the shutdown, forcing him to begin communication through screen text. Also, in the film the ''Leonov'' crew initially lies to HAL about the dangers that he faced (suspecting that if he knew he would be destroyed he would not initiate the engine burn necessary to get the ''Leonov'' back home), whereas in the novel he is told at the outset. However, in both cases the suspense comes from the question of what HAL will do when he knows that he may be destroyed by his actions.

In the novel, the basic reboot sequence initiated by Dr. Chandra is quite long, while the movie uses a shorter sequence voiced from HAL as: "HELLO_DOCTOR_NAME_CONTINUE_YESTERDAY_TOMORROW".

While Curnow tells Floyd that Dr. Chandra has begun designing HAL 10000, it has not been mentioned in subsequent novels.