In search of a real living dodo, the Doctor and Martha find themselves in the mysterious Museum of the Last Creatures. There, in the Earth section, they discover representatives of every creature that has gone extinct to this day: still alive and in suspended animation. The museum's sole job is to collect and preserve the last specimen of every endangered species from across the universe. But artifacts begin to disappear. Will the Doctor be able to solve this mystery before the museum curator adds the last Time Lord to his collection?