Rudolph the Red–Nosed Reindeer is a long-running Christmas television special produced in stop motion animation by Rankin/Bass. It first aired December 6, 1964 on the NBC television network in the USA and was sponsored by General Electric. It is based on the song by Johnny Marks, and in turn taken from the 1939 poem of the same title written by Marks' brother-in-law, Robert L. May. Since 1972, the special has aired over CBS, who unveiled a high-definition, digitally remastered version in 2005. As with A Charlie Brown Christmas and How the Grinch Stole Christmas, Rudolph no longer airs just once annually, but several times during the Christmas season. It has been telecast every year since 1964, making it the longest running Christmas TV special, and one of only four 1960s Christmas specials still being telecast (the others being A Charlie Brown Christmas, How the Grinch Stole Christmas, and Frosty the Snowman). And again, as with the Charlie Brown special, Rudolph has now been shown more than thirty-one times on CBS, although in this case, CBS was not Rudolph 's original network.