ENTERTAINMENT
May 4, 1996 | SUSAN KING, TIMES STAFF WRITER
Although he's induced plenty among viewers over the years, don't look for tears from executive producer Dan Lipman about "Sisters" closing its six-season run on NBC tonight. He never thought it would last this long and, now that it has, he believes it's time to move on. "I think there is a life span of a show--it builds, it peaks and then it starts to go down," says Lipman, who co-created the show with Ron Cowen.