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)

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)