'31 May, 1942: The Doctor and Ace arrive in Sydney just as a fierce battle breaks out in the harbour between Japanese subs and American warships. The Doctor visits a young fortune teller named Li Chen Mei, who gives him an empty jade box which the Doctor passes on to Ace for safekeeping. The Doctor then takes Ace to a boarding house run by Mrs Kitty Harris, and leaves her there while he visits the cliffs called the Gap. Ace sees Mrs Harris sacrifice a chicken for use in a magic ritual of some kind, and heads for the Gap, drawn by the humming of the empty jade box. There, she sees Mrs Harris' other billet, the American Corporal Jed Allum, attack a young Aborigine woman, apparently under the impression that she is one of the enemy. She intervenes, at first knocking Corporal Allum unconscious, but then, like Allum, becoming swept up by a compulsion to kill the enemy; fortunately, the Doctor arrives in time to stop her from killing Allum. He then takes her back to the boarding house, but she begins to see him as the enemy and tries to kill him with nitro-nine. Mei arrives just in time to knock Ace out, and she and the Doctor explain to Mrs Harris that her rituals are not having the effect she intended. Mei and the Aboriginal girl are guardians of the hymnal skein, a power which underlies all existence; Mrs Harris could sense the skein, and was foolishly attempting to manipulate it in order to keep her city safe from attack. The Doctor manages to convince her that she does not have the skill to do so, and she agrees to stop.'
[The Doctor is the Seventh Doctor.]
Source: drwhoguide.com (http://www.drwhoguide.com/whotrip7.htm).
Sighted: 2/6/11