John Hartman

Hartman served in the British military. (AUDIO: Through the Ruins) His daughter Yvonne disliked him, wishing that she could say the same about her own father as Rachel Allan did hers. (AUDIO: New Girl) The family moved around a lot because of his career. (AUDIO: Through the Ruins)

After a hiker was found dead in the woods by Fetch Priory, Dr Fendelman instructed Maximillian Stael to "get on to London. Tell Hartman I want a security team here within two hours." (TV: Image of the Fendahl) Security files on the Fendahl reached the Torchwood Institute through Yvonne, who had obtained them from her father. This was a deliberate plan by the Fendahl to have the files cross Gwen Cooper's path. (AUDIO: Night of the Fendahl)