DW Monsters: Kastrians

The primary antagonist in The Masque of Mandragora is not only a unique entity, but one that’s more of an abstract threat than something we could stat up; it produces visible effects and controls people, but it doesn’t really qualify as a “monster”. Following that story, though, is The Hand of Fear and Eldrad. Now, Eldrad himself is also unique, in that he’s the last surviving member of his species, the Kastrians, but because we can throw time travel into the mix, that doesn’t mean we could never meet another. Having said that, the Kastrians do not return, or even get much of a mention, elsewhere in the TV series. Indeed, their only other appearance to date is in the audio story Eldrad Must Die! which is, of course, a direct sequel.

DW Monsters: Krynoids

After The Brain of Morbius, which features a unique monster, we come to The Seeds of Doom (not to be confused with the Second Doctor story The Seeds of Death) and the Krynoids. There are only two in the story, but they’re a species of alien that could plausibly be found on many other planets, so they’re within my remit for these posts. The Krynoids are a one-off monster within the series, and have been little used elsewhere. Other than a few short stories, they have featured in only one licensed audio, Hothouse, which acts as a sequel to the TV serial without really expanding the description of the species.

Description and Biology

Krynoids are plants that begin their life cycle as seed pods flying through space. Once they land on a suitable planetary surface they germinate, infecting the nearest large animal by injecting them with bacteria-like cells. The original plant then dies, but the infective cells take over and restructure the host's body using it as the foundation to grow the second, reproductive, phase of the Krynoid. Essentially, then, we have two forms: the plant inside the seed pod, which produces the infective spores, and the much larger form that the spores grow into and that eventually produce new seed pods.