Tim Latimer

Timothy "Tim" Latimer was a schoolboy who attended Farringham School for Boys in 1913. His history master was John Smith, the human persona taken by the Tenth Doctor using a Chameleon Arch to hide from the Family of Blood.

Biography
As a boy during his school days, Tim feared being bullied for his intellect, so he made sure to make his grades just good enough.

The fob watch containing the Doctor's Time Lord essence communicated with Tim and instructed him. It could do this because Tim had low level telepathic abilities it could access. It also granted him a vision of the First World War, (TV: Human Nature) which he used to escape a shell at a critical moment. After the Family of Blood was defeated, the Doctor let Latimer have his watch to look after and for good luck. He fought in World War I and survived.

Many years later, the Doctor and Martha Jones saw him again as an old man, a veteran at a Remembrance Day ceremony. He still recognised them and silently acknowledged them, with tears in his eyes. (TV: The Family of Blood)

Personality
Tim shared a similar belief in not fighting others, especially if they were poorly armed to combat him, just like the Doctor. He respected the Doctor thanks to what he learned of him, yet still feared the darkness within him. (TV: The Family of Blood)

Behind the scenes

 * According to Doctor Who Confidential, Tim had telepathic abilities due to "an extra synaptic engram".
 * Tim Latimer is, in part, based on Timothy Dean, a character in the novel Human Nature.