Short answers, pulled from the story.
The word television first appeared in print on the 24th of August 1900. A Russian scientist named Constantin Perskyi used it during a paper presentation at the International Congress of Electricity held in Paris.
John Logie Baird employed the Nipkow disk to demonstrate televised silhouette images in motion on the 25th of March 1925 at Selfridges department store in London. His system had only 30 scan lines yet proved sufficient to identify a human face before electronic systems took over by 1939.
RCA agreed to pay Philo Farnsworth one million dollars over ten years plus license fees in September 1939 after the U.S. Patent Office decided that he held invention priority. This settlement followed interference suits filed against Farnsworth regarding patent priority with Vladimir Zworykin's work.
The first actual color broadcast occurred on the 8th of July 1954 as the episode The Marriage aired live. Most network programming remained black-and-white throughout the following decade until mid-1965 when over half of prime-time broadcasts switched to color.
Digital transition started globally in the late 2000s with governments setting analog shutdown deadlines for the 2010s. Practical implementation waited until DCT video compression technology became available in the early 1990s and General Instrument demonstrated a viable digital signal in June 1990.