 Complete the following phrase:  Brown played a recurring character on the television series Supernatural, where he portrayed vampire hunter Gordon Walker. Brown played Dr. Roland Burton on Army Wives. He portrayed Detective Cal Beecher on Person of Interest, while also appearing on the show Medium. In 2008, he played David Mosley on the Patience episode of Eli Stone. In 2016, Brown starred in the FX miniseries  as Christopher Darden, for which he won the Primetime Emmy Award for Outstanding Supporting Actor in a Limited Series or Movie at the 