Several outlets have published rankings of the best tv series finales, with some focusing on specific genres, such as sci-fi, or time periods, including the 2010s and the 21st century. The rankings vary in terms of the number of finales included, from 10 to 40, and some also consider other metrics, like viewer numbers. The lists appear to be subjective, with different outlets and users, such as those on imdb, offering their own takes on the best tv series finales.