The Talons of Weng-Chiang

S14 E21: London, the 1890s. As magician Li H'Sen Chang captivates audiences, a spate of disappearances amongst young women goes largely unnoticed. As soon as they arrive, the Doctor and Leela find themselves confronting the feared Tong of the Black Scorpion, and a menace from another time. And there's something fishy in the sewers, too... A man’s body is lifted from the Thames, covered in the bite marks of a giant rat.