The 604th episode of Doctor Who airs on BBC1. This story opens the 21st season, and marks the first appearance of the Silurians and Sea Devils since 1972 (and the first joint appearance of both); this is also the last Silurian story of the original series. Ingrid Pitt and Ian McCulloch guest star.
This timeline entry leads to an entry covering this entire Doctor Who serial; there are plans to write new episodic entries in the future. You can support this effort!
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