In the second episode of the four-part story "
The Visitation," the Doctor (Peter Davison) and his companions arrive in 17th century London at the height of the Great Plague. Their visit coincides with the crash-landing of an alien spacecraft. Could these visitors from another world pose an even greater threat to humanity than the "Black Death?" Written by Eric Saward, Doctor Who: The Visitation, Episode 2 first aired on February 16, 1982. ~ Hal Erickson, All Movie Guide