For questions related to the 1990 miniseries based on the Stephen King novel of the same name: DO NOT USE FOR QUESTIONS RELATED TO THE 2017 MOVIE. For that show use "it-2017"
IT is a 1990 TV miniseries based on Stephen King's eponymous novel.
Starring Tim Curry as a murderous clown, Pennywise and an ensemble cast.
The protagonists are The Lucky Seven, or The Losers Club, a group of outcast kids who discover Pennywise and vow to destroy him by any means necessary. The series takes place over two different time periods, the first when the Losers first discover Pennywise as children, and the second when they're called back as adults to defeat Pennywise, who has resurfaced.