It's down to the last two couples on FYI's hit reality TV series "Married at First Sight" and the future is uncertain for the arranged couples Neil Bowlus and Samantha Role, and Tres Russell and Vanessa Nelson. In two separate sneak peeks for the Tuesday (March 1) night season finale, the remaining couples face decision of staying married and continuing their journey or parting ways and getting a divorce.

During part one of the two-part season finale last week, Ashley Doherty ultimately decided not to stay with her husband David Norton at the end of the six-week social experiment. The decision didn't come as a surprise, since Doherty struggled with feeling attracted to her husband and they both struggled with intimacy throughout their marriage. Now it's time for the remaining couples to make their big decision.

In an extended sneak peek for tonight's episode, Role and Bowlus laid in bed together on the morning of decision day and they opened up about their feelings going into the meeting with the show's experts. Bowlus asked his wife how she felt and she admitted she felt nervous.

"Sam is understandably feeling more in knots than I am, 'cause she doesn't know how I feel. At the moment, I'm on the fence," Bowlus said in his on-camera interview.

But Bowlus agreed that he has experienced more ups than downs in the last few weeks in his relationship with his wife, and Role said the road bumps they faced early on in their relationship are what makes for a strong and meaningful marriage.

"I'm still 100 percent committed to this marriage," Role said in her on-camera interview. "I want to make this work and I hope Neil figures out what he needs to make this huge decision that could impact the rest of our lives."

A second sneak peek shows both couples sitting down in front of the experts on decision day. Role smiles and takes a deep breath before announcing her decision, but Russell and Nelson have more concerned looks on their faces. Russell and Nelson were the only couple this season to consummate their marriage, but they struggled with deeper intimacy and trust issues.

"This has been a very stressful process for the both of us," Russell told his wife in the clip, and Nelson can be heard sobbing as a camera followed her outside.

Watch the extended sneak peek below and be sure to catch the season finale of "Married at First Sight," airing Tuesday, March 1 at 9 p.m. on FYI.