Robert Singer is an American television producer , director and writer . He is best known for his work on Supernatural where he serves as an executive producer , director and occasional writer . Singer also created the series Reasonable Doubts and has worked as a producer and director on various television series , including Lois & Clark : The New Adventures of Superman . He also served as a producer for the film Cujo
Robert Singer (producer) has spent his entire career producing only live theater.