The four-part "
Enlightenment" begins as the Doctor (Peter Davison), acting upon a warning from the White Guardian, materializes the TARDIS on the deck of a vessel which bears a striking resemblance to an Edwardian sailing yacht. The yacht is about to embark upon a race, the prize of which is dearly coveted by a rather nasty alien species known as the Eternals. Written by Barbara Clegg, "Enlightenment, Episode 1" first aired on March 1, 1983. ~ Hal Erickson, All Movie Guide