A special guest star has been announced to appear in Season 15 of Supernatural - more info under the cut!
Christian Kane is going to appear on an episode of Supernatural in Season 15. He will play Leo, a former hunter who knew Dean back in the day.
Christian was really a part of SPN fandom back in the early days. In real life he was friends with Steve Carlson with whom he formed the band Kane, and Jensen.
In fanfic, Christian became a popular character during his Angel days, as both his character Lindsay, but also in RPF where he was often paired with friend David Boreanz. Later there was the CWRPF (or WBRPF) universe that mashed up actors from Smallville, One Tree Hill and Supernatural, and their friends including Steve Carlson (who Christian was often paired with) and Chad Micahel Murray aka Mayhem, and later Aldis Hodge who had appeared on SPN and also Leverage with Christian. His last leading role was in The Librabrians, also by John Rogers who made Leverage.