Hell hath no fury like a coyotl scorned. Brothers & Sisters
actor John Pyper-Ferguson
will guest-star on "Bad Moon Rising," the third episode of Grimm's second season, TVGuide.com has learned exclusively. He'll play Hayden Walker, a man who is mourning his deceased sister and wants to exact justice from Jarold (Mark Pellegrino
) for disgracing his family name. Only problem? Hayden has to take his family to Portland to track Jarold down....