Sisters is a television drama which aired on NBC for six seasons, from 1991 to 1996. The series was created by Ron Cowen and Daniel Lipman, who were also the executive producers and showrunners. The show debuted on May 11, 1991 for a seven-episode test run and was subsequently renewed for the 1991 fall schedule. Sisters was one of the first 'demographic' hits because of its strong female viewership.