ABC Family's Switched at Birth is back for a second season, and we caught up with castmates Lea Thompson and Vanessa Marano to get the scoop on what's in store. Lea and Vanessa filled us in on the season premiere surprise, and how some of the plot twists to come shocked even them! The duo also spoke about how they formed their mother-daughter dynamic, and revealed that many relationships in the series are set to change in the coming episodes. Switched at Birth airs tonight on ABC Family at 7:00
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