 Despite the success of the serial, Kneale felt that he had now taken the character of Quatermass as far as he could. "I didn 't want to go on repeating because Professor Quatermass had already saved the world from ultimate destruction three times, and that seemed to me to be quite enough," he said in 1986. It was also his final new collaboration with Rudolph Cartier, although the director did later handle a new version of Kneale's 1953 adaptation of Wuthering Heights for the BBC in 1962.
