![]() | A separate screenplay by Nigel Kneale for theaters, parallel to the 1979 Quatermass four part mini-series. The story set in the near future involves influences from outer space that are possessing people. Professor Quatermass must save his granddaughter from the clutches of a popular and sinister cult "Planet People" that "performs raptures". |
| John Mills | - | Prof. Bernard Quatermass |
| Simon MacCorkindale | - | Joe Kapp |
| Barbara Kellerman | - | Clare Kapp |
| Margaret Tyzack | - | Annie Morgan |
| Brewster Mason | - | Gurov |
| Ralph Arliss | - | Kickalong |
| Paul Rosebury | - | Caraway |
| Jane Bertish | - | Bee |