| |
| Television credits |
| |
| ARROW TO THE HEART | BBC tx 20/7/1952 | additional dialogue |
| MYSTERY STORY | BBC tx 17/8/1952 | adaptation |
| THE CATHEDRAL | BBC tx 26/10/1952 | adaptation |
| THE LAKE | BBC tx 29/3/1953 | adaptation (uncredited) |
| THE AFFAIR AT ASSINO | BBC tx 1/1/1953 | adaptation |
| THE COMMONPLACE HEART | BBC tx 13/1/1953 | adaptation |
| WEDNESDAY THEATRE: Curtain Down | BBC tx 21/1/1953 | script |
| NUMBER THREE | BBC tx 1/2/1953 | adaptation |
| THE QUATERMASS EXPERIMENT | BBC tx 18/7-22/8/1953 (6 pts) | script |
| GOLDEN RAIN | BBC tx 2/8/1953 | adaptation |
| WUTHERING HEIGHTS | BBC tx 6/12/1953 | adaptation |
| NINETEEN EIGHTY-FOUR | BBC tx 12/12/1954 | adapted for television by |
| THE CREATURE | BBC tx 30/1/1955 | script |
| THE MOMENT OF TRUTH | BBC tx 10/3/1955 | adaptation |
| QUATERMASS II | BBC tx 22/4-26/6/1955 (6 pts) | script |
| SUNDAY-NIGHT THEATRE: ARROW TO THE HEART | BBC tx 1956 | additional dialogue |
| MRS WICKENS IN THE FALL | BBC tx 8/8/1957 | script |
| QUATERMASS AND THE PIT | BBC tx 22/12-26/1/1959 (6 pts) | screenplay |
| PANORAMA | BBC tx 26/1/1959 | on-screen participant |
| WUTHERING HEIGHTS | BBC tx 11/5/1962 | screenplay |
| FIRST NIGHT: The Road | BBC tx 29/9/1963 | script |
| STUDIO 64: The Crunch | ITV tx 19/1/1964 | script |
| LATE NIGHT LINE-UP | BBC2 tx 27/11/1965 | on-screen participant |
| THEATRE 625: The World of George Orwell 1984 | BBC2 tx 28/11/1965 | script |
| THEATRE 625: The Year of the Sex Olympics | BBC2 tx 29/7/1968 | script |
| THE WEDNESDAY PLAY: Bam! Pow! Zap! | BBC1 tx 5/3/1969 | script |
| THE WEDNESDAY PLAY: The Wine of India | BBC tx 15/4/1970 | script |
| OUT OF THE UNKNOWN: The Chopper | BBC2 tx 16/6/1971 | script |
| THE STONE TAPE | BBC2 tx 25/12/1972 | script |
| BEDTIME STORIES: Jack and the Beanstalk | BBC2 tx 24/3/1974 | script |
| AGAINST THE CROWD: Murrain | ITV tx 27/7/1975 | script |
| BEASTS | ITV tx 16/10-20/11/1976 (6 edns) | script |
| THE BOOK PROGRAMME: Tales of Horror | BBC2 tx 16/12/1976 | interviewee |
| LATE NIGHT STORY: The Photograph | BBC2 tx 24/12/1978 | script |
| QUATERMASS | ITV tx 24/10-14/11/1979 (4 pts) | screenplay |
| KINVIG | ITV tx 4/9-16/10/1981 (7 eps) | script |
| UNNATURAL CAUSES: Ladies' Night | ITV tx 6/12/1986 | script |
| THE ITV PLAY: Gentry | BBC tx 31/7/1988 | script |
| THE WOMAN IN BLACK | BBC tx 24/12/1989 | screenplay |
| STANLEY AND THE WOMEN | BBC tx 28/11-19/12/1991 (4 pts) | script |
| THE LATE SHOW: Rudolph Cartier: Television Pioneer | BBC2 tx 1/7/1994 | interviewee |
| SHARPE: Sharpe's Gold | ITV tx 12/4/1995 | adaptation |
| KAVANAGH Q.C.: Ancient History | ITV tx 17/3/1997 | script |
| SF:UK: When Aliens Attack | Channel 4 tx 1/4/2001 | on-screen participant |
| SF:UK: Big Brother Goes Hardcore | Channel 4 tx 1/4/2001 | on-screen participant |
| TIMESHIFT: Watching You | BBC Four tx 22/5/2003 | on-screen participant |
| THE KNEALE TAPES | BBC Four tx 15/10/2003 | interviewee |
| TIMESHIFT: Fantasy 60s | BBC Four tx 26/6/2004 | interviewee |
| THE QUATERMASS EXPERIMENT | BBC Four tx 2/4/2005 | original script |
| TIMESHIFT: Live on the Night | BBC Four tx 2/4/2005 | interviewee |
| |
| Film credits |
| |
| THE QUATERMASS XPERIMENT / THE CREEPING UNKNOWN / SHOCK!! | 1955 | original television play |
| QUATERMASS 2 / ENEMY FROM SPACE | 1957 | screenplay / original story |
| THE ABOMINABLE SNOWMAN / THE SNOW CREATURE / THE ABOMINABLE SNOWMAN OF THE HIMALAYAS | 1957 | screenplay / story |
| LOOK BACK IN ANGER | 1959 | screenplay |
| THE ENTERTAINER | 1960 | screenplay |
| H.M.S. DEFIANT / DAMN THE DEFIANT / THE MUTINEERS | 1962 | screenplay |
| FIRST MEN IN THE MOON | UK/US, 1964 | screenplay |
| THE WITCHES / THE DEVIL'S OWN | 1966 | screenplay |
| QUATERMASS AND THE PIT / FIVE MILLION YEARS TO EARTH | 1967 | screenplay / original story |
| THE QUATERMASS CONCLUSION | 1978 | script |
| HALLOWEEN III: SEASON OF THE WITCH | US, 1983 | screenplay (uncredited) |
