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.

The workers take over the plant and it is destroyed by an explosion. Quatermass gets back to the Rocket Group and prepares to launch his Quatermass II rocket - destination: the asteroid.

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.

Broadhead becomes the latest victim of the gas. Quatermass tricks his way inside the plant with Ward and Fowler. Ward gets separated and strays into one of the food domes - then emerges covered in a burning synthetic food, and dies. Back at the rocked base, Pugh has discovered the origin of the objects - an asteroid on the dark side of the Earth.

Dillon has been affected and now has a scar on his cheek. He is taken away to the plant by some zombie-like guards and Quatermass is unable to find out what has happened to him. He later visits Vincent Broadhead, an MP who has been probing the plant's activities, and joins him at an official inquiry, But several of the commission also bear scars.

Army captain John Dillon defies a clampdown to take the remains of a crashed object to Quatermass's British Rocket Group. Quatermass returns with him to the crash site - a huge domed chemical plant. While they are there, another small object crashes, a gas seeps out and a small bubble appears on Dillon's cheek.