Above are the 20 highest-scoring special TV programs—including "limited" series, made-for-TV-movies, and one-off specials—debuting in the United States between January 1, 2018 and December 31, 2018. Titles are ranked by Metascore (an average of grades from top professional critics on a 0-100 scale) prior to rounding, and any programs with fewer than 7 reviews are excluded. (Looking for the best regular TV series of 2018? Those are ranked in a separate list.)

Note that Netflix original films (such as Roma and The Ballad of Buster Scruggs) generally open in at least a few theaters prior to (or in conjunction with) their streaming debuts, and are excluded here. (They will be eligible for our Best Movies of 2018 list instead.)