Quatermass picks up Carroon's trail and believes that the mixture of chemicals he has taken will accelerate his metamorphosis. Meanwhile, the killing starts - and Westminster Abbey a pulsating mass is revealed clinging to the building.
Guest Cast
![No image yet, be the one to add it. No image (yet).](https://static.tvmaze.com/images/no-img/no-img-portrait-clean.png)
Anthony Green
as Boy![No image yet, be the one to add it. No image (yet).](https://static.tvmaze.com/images/no-img/no-img-portrait-clean.png)
John Stone
as TedCast Appearances
Episode Discussion
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