Married at First Sight is back for a season 4. Six new singles are preparing to marry a complete stranger in this controversial social experiment. The participants find out who they've been matched with and have just 2 weeks to prepare for their weddings. The preparations are filled with high emotions as they come to terms with being engaged to a complete stranger.

The brave newlyweds who married as strangers are about to experience time alone for the very first time on their wedding night; will the couples experience a night of passion? Relationship expert, Rachel DeAlto, visits each couple to give them advice before they head off to their honeymoons. Sonia and Nick work on overcoming their insecurities; Heather and Derek start to learn about each other's habits; and as Tom and Lillian grow closer, Tom keeps a secret from Lillian.