30th Anniversary (1978) Jan. 1: The Bee Gees dominate the universe Not even The Beatles ruled the charts like this: Thanks largely to the "Saturday Night Fever" soundtrack, during an eight-month period beginning in the Christmas season of 1977, the brothers Gibb wrote six songs that hit No. 1 for 25 of 32 weeks: three of their own ("How Deep Is Your Love," "Stayin' Alive," "Night Fever"), two for brother Andy ("(Love Is) Thicker Than Water," "Shadow Dancing") and one for Yvonne Elliman ("If I Can't Have You"). April 2: "Dallas" The first time we saw oily bad guy J.R. Ewing (Larry Hagman), we knew the bar on TV villainy had just been raised. June 16: "Grease" The `50s-set movie (based on the Broadway musical) that millions are still hopelessly de- voted to. July 28: "National Lampoon's Animal House" Double secret probation ... "Fat, drunk and stupid is no way to go through life." ... "Toga! Toga! Toga!" Sept. 14: "Mork & Mindy" "Happy Days" spinoff unleashes a maniac named Robin Williams on an unsuspecting world.'Dallas' photo courtesy of Warner Bros.