For the past two decades, filmmaker Doug Block (HBO’s “51 Birch Street,” “The Kids Grow Up”) has helped support his documentary work by shooting the occasional wedding. Known for his intimate, fly-on-the-wall style, he repeatedly found himself bonding with couples on their big day, never to see them again once the video was completed. Having long wondered what became of some of these marriages, Block began to track down a few of his favorite couples. Juxtaposing rapturous wedding-day flashbacks with remarkably candid present-day interviews, the documentary 112 WEDDINGS asks what comes after “I do,” exploring timeless themes of love, romance and commitment when it debuts MONDAY, JUNE 30 (9:00-10:35 p.m. ET/PT) on HBO.