Last night was a special one for fans of TNT’s soap opera-esque Dallas revival with the premiere of two all-new episodes, the second of which was the epic two-hour season two finale! The main question asked over the past two seasons, "Who killed J.R.?" was finally answered (no spoilers here!), setting the stage for a third season full of new alliances, friendships, and (of course) enemies. Meanwhile, Elena got prepared to meet Christopher's mother, but the revelation of a shocking secret surprisingly drove the two apart. "I wanted to put Elena is a dress that felt like it could go from traveling right into the potential special moment of meeting her future mother-in-law," the show's costume designer, Rachel Sage Kunin, told InStyle.com. "Of course things didn't go quite as planned, but at least she was ready!" Oh, the drama! Click the photo to learn more about last night's style on the show.