It all came down to this. Victoria Cocieru, Sergio Guadarrama, Geoffrey Mac and Nancy Volpe-Beringer went into the season finale of “Project Runway” season 18 on March 12. So who won the whole competition? And did the judges (including guest judge Serena Williams) make the right decision? Find out below in our live blog with all the minute-by-minute developments as they happen.

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“Finale, Part 2” followed last week’s cliffhanger. The finalists spent five months and $10,000 creating 10-look collections to decide the ultimate winner. But they had to show three sample looks from those collections to the judges and receive feedback. It was possible only two or three of the finalists would actually get to present their collections at Fashion Week. So this week’s show answered that question up top. But the more important question remained of who would win.

Mac was the front-runner in our odds,...