I don't know how many of you who watched River Song's Wedding noticed the brief tribute to Brigader Lethrige Stewardt. When the Doctor called, the nurse informed him that the Brigader had died three months previous. Nicholas Courtney, the actor who played the Brigader, died on February 22, 2011. He was the most re-occurring charactor of the original Doctor Who series. His charactor appeared with Doctors 2,3,4,5&7.