He also directed no less than three productions of Sherlock Holmes, beginning with an ITV episode in 1965 that starred Peter Cushing as the detective. This was later followed by the Polish-British co-production Sherlock Holmes (1979) starring Geoffrey Whitehead, and finally Sherlock Holmes and the Leading Lady (TV movie 1991) starring Christopher Lee.
He came to know the two great masters of British horror very well after being taken on by Hammer studios, with whom he made his feature film debut in 1969. Taste the Blood of Dracula (1970), was the fifth Hammer film about the Transylvanian count and the fourth to feature Christopher Lee, although Dracula himself has very little screen time. In compensation for some awful dialogue the production values are relatively high, with lavish 19th century sets, shadowy Gothic lighting and some brilliant camera work.
The originality of these themes, and the subtle, intelligent way in which they are handled are startling, and it remains a deeply unsettling film even today despite its dated acting style (it comes across as a filmed play, complete with some overtly theatrical performances) and limited effects. The chills come from the sound design rather than the visual effects, as Brock's team cranks up the noise in order to increase their chances of recording a response from the room's 'presence.'
starring Robert Powell, John Paul and Simon Oates that had been inspired by Nigel Kneale's Quatermass. Again, it was well ahead of its time, tackling the issue of environmental pollution and government cover-ups, albeit with a creepy atmosphere and marketing campaign that would have been more appropriate for a Hammer horrors than for the actual film itself.
Both Paul and Oates reprised their roles, with Powell's place taken by Scottish actor Ian Bannen, and George Sanders playing an admiral. It was filmed in Cornwall, around the area of Polkerris and Polperro.
Alongside his film output Sasdy continued doing working for television, including episodes of popular series such as The Return of the Saint (1978-79), Minder (1979) and The Secret Diary of Adrian Mole Aged 13¾ (1985-87.) His association with Hammer ensured he was kept on board when the studio broke onto the small screen with The Hammer House of Horror (three episodes, 1980) and The Hammer House of Mystery and Suspense (three episodes, 1984.) His last TV production was an Omnibus documentary on another Hungarian director, Alexander Korda, whom Sasdy has often cited as a major inspiration. The disproportionate contribution made by Sasdy's countrymen to the visual arts has led some to wonder what it is about Hungary that has produced so many brilliant photographers and film directors. But as Korda himself once quipped, 'It's not enough to be Hungarian - you must have talent too.'