Lawphoram

From Tardis Wiki, the free Doctor Who reference

Lawphoram was a parasitic creature from the future and from another world that somehow arrived on Earth in the early 1890s and started to feed on the mind and body of Anthony Bradshaw. By offering glimpses of the future, Lawphoram was the unseen star of the variety act billed as The Amazing Anthony – The Wonder of 1898 until it was exorcised by Captain Jack Harkness and made to leave the boy's body. (PROSE: Best Friends)