Boston’s WBUR announced today that Christopher Lydon will rejoin the station to host and produce a weekly hourlong show, Open Source with Christopher Lydon. Bostonians last heard Lydon on WBUR when he hosted The Connection, a nationally syndicated interview show, from 1994 to 2001. He and much of his staff left WBUR in a bitter public dispute over ownership of their show, and Dick Gordon replaced him in the host’s chair. Lydon returned to the airwaves in Boston earlier this year as a contributor on WGBH. The new WBUR program will launch in January, airing Thursdays at 9 p.m. and with a repeat broadcast on weekends.