‘Bridgerton’s Yerin Ha and Luke Thompson chat with ET about season 4 spoilers! Part 1 is streaming now on Netflix. Part 2 drops on Feb. 26. Luke explains how he prepared to take on a larger role this season, and Yerin shares how her storyline puts a twist on the classic tale of Cinderella. Plus, the pair shares what behind-the-scenes work went into their steamy staircase encounter and gives fans a taste of what to expect from the rest of the season 4.