Scene from an unaired Supernatural episode where Sam and Dean visit a diner run by a demon and accidentally drink demonic soup. Here, the demon summons more demonic soup in her oversized crystal ball. Studio executives pulled the episode as they thought it would anger the powerful Diner Lobby.&amp;nbsp; Monster Soup, commonly&amp;nbsp;called Thames Water , coloured engraving by William Heath, published by&amp;nbsp;T McLean, London, 1828.&amp;nbsp; Wellcome Library, image no.&amp;nbsp;  L0006579.