Caitlin (Shades of Gray)
From Tardis Wiki, the free Doctor Who reference
Caitlin was at the psychiatric hospital at which Dorian Gray consulted. She appeared and disappeared at will from a locked cell, even though she wasn't a patient. She would only reveal her name to Dorian, much to the surprise of Dr Warrilow and Dr Hawke. She told Dorian that she advised her friend Amelia Blythe to kill herself. She told Dorian to run. She knew that she was a figment of a dead girl's imagination. (AUDIO: Shades of Gray)
