Yes, I will correct the list member who stated that the first non-experimental tv showing was in 1922. He is referring to Marconi's wireless radio service. The technical history of television is really quite fascinating.
According to the BBC website:
"John Logie Baird had given the first public demonstration of low-definition television back in 1925. There had been experimental transmissions from a studio in Broadcasting House since 1932. On 2 November 1936 the BBC opened the world's first regular service of high-definition television from Alexandra Palace in North London, known affectionately as Ally Pally. Not many people could pick up the "flickering" rays of the first programmes on their 10-inch televisions. The transmissions reached only the 20,000 homes with a television within a 35-mile range of Alexandra Palace. The first sets cost about £100, the same price as a small car."