FOUR SIDED TRIANGLE (Terence Fisher, 1953) FOUR SIDED TRIANGLE #2 SPACEWAYS (Terence Fisher, 1953) SPACEWAYS #2 THE QUATERMASS XPERIMENT aka THE CREEPING UNKNOWN (Val Guest, 1955) THE QUATERMASS XPERIMENT #2 - US poster THE QUATERMASS XPERIMENT #3 - Polish Poster X THE UNKNOWN (Leslie Norman, 1956) X THE UNKNOWN #2 QUATERMASS 2 aka ENEMY FROM SPACE (Val Guest, 1957) QUATERMASS 2 #2 - French