Medium is an American television drama series that premiered on NBC on January 3, 2005, ending its run on that network on June 1, 2009. The series then moved to CBS on September 25, 2009, airing its final episode overall on January 21, 2011. Medium was created by Glenn Gordon Caron and was produced by his company Picturemaker Productions and Kelsey Grammer's Grammnet Productions in association with Paramount Television from 2005–06, CBS Paramount Television from 2006–09 (after the split of Viacom and CBS Corporation), and finally CBS Television Studios from 2009 until the series ended.