Watch Marriage Boot Camp Online: Season 3 Episode 12

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It all came down to Marriage Boot Camp Season 3 Episode 12.

And by "all," we mean the relationships at the heart of this popular reality series.

On the season finale, the reality stars who have been through so many ups and downs this summer had to make the ultimate decision: to stay together or to call it quits?

It didn't help some, either, that the results from the lie detector test sparked doubt as to what they should do.

Which spouse shocked his or her partner at the at the final ring ceremony?

There's one guaranteed way to find out: sit back and watch Marriage Boot Camp online now. Do it!

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.

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