Oliver is the name of the dog that William McIntyre supposedly had when he was a child. This is revealed in The Maze of Bones, and it is said William McIntyre and Oliver had a strong relationship, even though William was never an animal-kind of person according to him when he gave back Saladin to Amy and Dan. William McIntyre obviously loved Oliver, because he used his name as a password to his phone.


He was mentioned as the answer to card 66.

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