Goofs

At the end of the film, as buildings start falling down, the debris from the buildings bounces as though it's made from Styrofoam.

The top half of a complete skeleton is revealed when the workman pulls a lump of clay away with his shovel, but during the press conference, the archaeologist says they've only found some skull fragments and lower limbs.

Just before the workman begins his attempt to drill into the buried ship, as Quatermass joins him, gloves magically appear on his hands.

When the spaceship starts to come alive, wires can be seen holding up the floating debris in the tunnel.

Colonel Breen, with a Public School and Sandhurst background obvious from his patrician bearing, is displaying the ribbon for the Long Service and Good Conduct medal, awarded exclusively to soldiers and NCOs for 21 years service. Conversely, although he professes to have served during WW2, he wears no WW2 medal ribbons.

Roney tells Quatermass that the skulls found fit into the known pattern of evolution, but then says that the enormous skulls are different. Skull size is an important part of determining hominid evolution so it would not actually fit into any known pattern.

(at around 84 mins) The improvised railway rails and their supporting beams bend in the way that one realizes they are made of either inflated rubber or a foam.

When Roney and Quatermass enter the "missile", they both are wearing gloves to protect themselves against the cold surface. When they take the arthropod's body out, Roney has taken off his gloves. When they pass it over to the soldiers, he is wearing gloves again.

Sladden goes back into the Underground dig site, and the lights go out. He takes out his flashlight, and someone off-camera shines a light in front of Sladden to provide the appearance of light shine due to the underpowered flashlight.

The final shot of Quatermass and Barbara, playing out under the end credits, is the same twenty-one or so seconds of footage looped four times.

The TV in the pub is showing colour pictures. Colour television wasn't introduced on the main BBC1 and ITV channels until the end of 1969, two years after the film was produced.

A minute or so before the end credits roll, as Quatermass is walking away from the devastation, a crew member's hand swings into the right-hand side of the frame and back out again.

When Sladden is being tossed about the Martian missile, several tools are tossed about as well. Strings can be seen attached to the tools.

When Breen gets into a cab to leave Hobbs Lane, the crew is clearly reflected in the door window of the cab.

Early in the film a cab leaves from Hobbs Lane and the camera and a crew member are clearly reflected in the cab door window.

An intelligent man like Roney should have known that he wasn't heavy enough to use his weight to move the stuck crane.

When the expert is drilling to break through the wall of the space ship, he is not wearing goggles to protect the eyes from metal splinters. A drilling expert would have used them.