Morality was the contrasting of "right" and "wrong", good and evil. According to Kahler-Jex, morality was the Doctor's prison. (TV: A Town Called Mercy)

It had a similar basis across N-Space. (PROSE: All-Consuming Fire)

On Skaro, the First Doctor was questioned by Susan over his intention to support a Thal attack on the Daleks. She asserted that they were against war, leading the Doctor to reply that it was "no time for morals". (TV: "The Expedition")

The Doctor thought that Odysseus had "a most immoral way of looking at life" when he voiced his hope that Agamemnon or Achilles would die, leaving him with a greater share of the loot. (TV: "Horse of Destruction")

The Doctor felt a "moral obligation" to protect a Cornish village from Captain Pike, believing he had a responsibility to prevent its destruction. (TV: The Smugglers)

As the Sixth Doctor attempted to deactivate the MASER that would kill the High Council, the Valeyard taunted him by shouting "There's nothing you can do to prevent the catharsis of spurious morality!" (TV: The Ultimate Foe)

The Archimage said he "was led to believe that [the Doctor was] a force for good in the universe, a crusader for justice and morality." (PROSE: Millennial Rites)

The Eighth Doctor said of Romana that she didn't understand that "the morality of an organisation – a race – [was] no better than the morality of its most immoral member". (PROSE: The Banquo Legacy)

Mavic Chen objected to Steven Taylor's moralising when he berated him for having formed an alliance with the Daleks based on greed. (TV: "The Abandoned Planet")

Clent called Elric Penley "a coward in the mind" for running away from moral judgement and other responsibilities. (TV: The Ice Warriors)

Watkins told the Second Doctor that Tobias Vaughn was "a ruthless man, without morals or principles." (TV: The Invasion)

Carrington believed it was his "moral duty" to unmask three aliens as enemies of humanity. This led him to commit acts such as threatening the Third Doctor with a gun. (TV: The Ambassadors of Death)

The Fourth Doctor thought it morally wrong to celebrate the death of an enemy, as Leela did a Rutan scout she killed. (TV: Horror of Fang Rock)

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