Watch 'Supernatural' Season 13 Episode 6 : "Tombstone" (S13E6) br br Supernatural Season 13 Episode 6 : Tombstone br br Watch Now ?? @ br Download Free : br br Episode Name : Tombstone br Networks : The WB Television Network, The CW br Genres : Sci-Fi & Fantasy, Mystery, Drama br br Storyline: br When multiple patients of grief counselor Mia Vallens turn up dead, Dean, Sam and Jack investigate the mystery surrounding the murders and, each inadvertently, are forced to deal with unresolved grief of their own.