Zac and Lydia kiss for the first time at their wedding on the next episode of “Welcome to Plathville.”

“Welcome to Plathville,” season seven, episode nine, airs at 10 p.m. Tuesday, Sept. 16, on TLC.

LIVE STREAM: Fans can watch TLC without cable on Philo, which has a seven-day free trial; DirecTV , which has a five-day free trial; and SlingTV.

The episode is called “The First Kiss.”

The synopsis is, "Zac and Lydia finally say ‘I do’ and share their first kiss. An unexpected confrontation leaves Lydia and Zac at odds with Ethan and Isaac."

In season seven, Zac and Lydia became engaged and married within only for months of meeting, Barry and Kim are still navigating their divorce and Moriah is trying to avoid family drama.

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