Knight

Knight is the term for a social position originating in the Middle Ages. It is denoted by the prefix "Sir" in front of the recipient's given name.

Among the knights encountered by the Doctor or his companions are:
 * Sir Ian Chesterton
 * Sir Gilles Estram
 * Sir Keith Gold
 * Sir Charles Grover
 * Sir George Hutchinson
 * Sir Lancelot
 * Brigadier Sir Alistair Gordon Lethbridge-Stewart
 * Sir Robert MacLeish
 * Sir Humphrey Picton
 * Sir Robert Muir
 * Sir Reginald Styles