When does It return?

It is a 1990 ABC two-part psychological horror drama miniseries directed by Tommy Lee Wallace and adapted by Lawrence D. Cohen from Stephen King's 1986 novel of the same name. The protagonists are The Lucky Seven, or The Losers Club, a group of outcast kids who discover Pennywise and vow to kill him by any means necessary. The series takes place over two different time periods, the first when the Losers first confront Pennywise as children in 1960, and the second when they return as adults in 1990 to defeat him a second time after he resurfaces.