BROTHERS & SISTERS – “Nearlyweds” – In typical Walker fashion, Justin and Rebecca’s on-again, off-again beachside wedding plans take a shocking turn, while Tommy takes a dangerous risk to assure that his daughter is by his side, on “Brothers & Sisters,” SUNDAY, DECEMBER 6 (10:01-11:00 p.m., ET), on the ABC Television Network. (Photo by by Craig Sjodin/ABC via Getty Images) KEN OLIN, PATRICIA WETTIG