Bryan Fuller will no longer be showrunner of “Star Trek: Discovery,”instead Gretchen Berg and Aaron Harberts are filling Fuller’s showrunner shoes as the series gears up for filming next month in Toronto, Canada. Also Akiva Goldsman will provide “producing support” for Berg and Harberts. Alex Kurtzman, the series’ executive producer from the beginning, is still attached to the project in the same role. Fuller’s stepping down is reportedly a result of some strain with producer CBS Television Studios.