EXCLUSIVE: There is a change afoot at the helm of the CW’s veteran drama series Supernatural. Sera Gamble, who has been with the show since the beginning, serving as co-showrunner alongside Robert Singer for the past two seasons, will be stepping down. Word is that she opted not to renew her contract to focus on development. Jeremy Carver, executive producer/co-showrunner of Syfy’s Being Human, is joining Supernatural as an executive producer and will co-run the series with Singer next season. The CW has not made any formal renewal decisions yet but Supernatural is one of the network’s stronger ratings performers and is fully expected to return in the fall. This marks Carver’s return to Supernatural where he served as a co-producer during the 2009-10 season before leaving to co-run with his wife Anna Fricke Syfy’s Being Human, which the two wrote together based on the British show. UTA-repped Carver will keep his executive producer credit on Being Human, which will now be run solo by Fricke, making them a rare couple of writer-producers showrunning two series at the same time. Supernatural creator Eric Kripke, who stepped down as the day-to-day showrunner after the show’s sixth season in 2010 when Gamble and Singer took over, remains an executive consultant.