It is revealed that Quatermass' daughter Paula, who was played by Monica Grey in Quatermass II (1955), married a man named Carlson and had a daughter named Hettie (short for Hester). She and her husband were killed in a car accident on the Autobahn, leaving Hettie in Quatermass' care. On his photographs of her, her name is inconsistently both Hettie Carlson and Hester Quatermas [sic].
Quatermass lives in a cottage by a loch, in the West of Scotland: Port A'Builh, Loch Maree, Scotland.
The television producer in this segment is played by an actual TV producer, Joy Harington, a BBC veteran who had returned to her earlier profession of actress.