Executive Producer Greg Berlanti Browse All Authors Famous Quotes by Executive Producer Greg Berlanti Yes, there will be a musical crossover, there’s going to be a musical pair of episodes in the back half of the year between ‘ Supergirl ’ and ‘ The Flash. ’. Executive Producer Greg Berlanti entertainment We have a number of people who can sing across all the shows, who will be making some very exciting appearances in the back half of the year. Executive Producer Greg Berlanti entertainment
