Lethe (The Parliament of Rats)

Lethe was an ocean planet. Its human population was island-based. The planet was ravaged by time fractures. The Fifth Doctor and Nyssa landed on Lethe and were rescued by the crew of the Lung of Heaven. (PROSE: The Parliament of Rats)

During the War, it became the site of the Lethean Campaign. (PROSE: The Book of the War)

Lethe (The Parliament of Rats)