Complex sentence: The first made-for-TV movie was released theatrically in March 1979 as "Buck Rogers in the 25th Century" The film made $21 million at the North American box office, prompting Universal to move ahead with a weekly series later that year.
Split into simpler sentences: The first made-for-TV movie was released theatrically in March 1979. The movie made $21 million at the North American box office, prompting Universal to move ahead with a weekly series later that year.