Directed by
Fiona Cumming.
In the second episode of the four-part story "Snakedance," the Doctor (Peter Davison) has lost control of the TARDIS, which is in the hands of his companion, Tegan (Janet Fielding) -- who, in turn, has become the mind-slave of the malignant force Mara. Arriving on the planet Manussa, the brainwashed Tegan prepares to help the Mara use a local celebration to revitalize itself to its full malevolent power. Written by Christopher Bailey, "Snakedance, Episode 2" first aired on January 19, 1983. ~ Hal Erickson, All Movie Guide