Certainly an interesting article, but it does read more like a list of the journalist's favorite TV shows. I only spotted one show made before the 80s and no shows made outside of America, so "greatest of all time" is a bit misleading. From my shelves I'd volunteer the first episode of Doctor Who ("An Unearthly Child", 1963) which was totally unlike anything that had been on TV before. I also remember being captivated by the first episode of I, Claudius, but I'm not sure that counts as a pilot as it was never intended to be an ongoing series.