Quatermass visits the community near the plant but encounters suspicion as he tries to stir up the workers - until a new falling of objects convinces them. They march on the plant and, inside, Quatermass see a huge alien creature growing inside one of the food domes.

Quatermass succeeds in launching his rocket and he and Pugh for the asteroid. But Pugh has been over and Quatermass must overcome his attack before he can defeat the evil force on the asteroid.