Steamroller Man
From Tardis Wiki, the free Doctor Who reference
Steamroller Man was a man that the haunting the Dead Man, and Helen Towers could sense. Hannah Bartholemew couldn't see him, whereas the Fifth Doctor and Nyssa could. It came from one of [[Sandra Jane Rimdelle]'s childhood books. It was designed to delete code and bugs from the system, but then started to delete people. (AUDIO: Masquerade)