ABC has released a new plot synopsis for the season 6 finale of Castle and it looks like Castle (Nathan Fillion) and Beckett (Stana Katic) might have some more trouble with the marriage process.

Beckett Linked To Death Of Man Involved In Her Mother's Murder?

The long-awaited wedding of Castle and Beckett seems to be getting closer and closer, as teased in the plot synopsis for the final episode of season 6, which is titled For Better or Worse.

"Castle and Beckett's long-awaited wedding is almost here, but when a shocking surprise threatens to ruin the big day, they are sent on a wild mission filled with masked men, angry bikers and a charming ne'er-do-well from Beckett's past (guest star Eddie McClintock, Warehouse 13)." the synopsis reads.

Beckett The Victim Of Sexism In New Case

The episode's guest list includes McClintock as the ne'er-do-well Rogan O'Leary, Maya Stojan as Tory Ellis, Nicole J. Butler as Cassandra and Doug Simpson as Henry Browning.

Castle show runner Andrew W. Marlowe spoke with Give Me My Remote recently about the impending nuptials for the crime-fighting duo and what their big plan is going forward.

"What I'll say is we're trying to present a couple who are in the process of planning a wedding, and things get talked about, and things come up as you get close to the date," Marlowe revealed. "We think it would be unfair not to talk about it, not to show it, because it is very much a part of their lives."

Castle season 6 airs Mondays at 10 p.m. on ABC.

Watch the promo for the next episode of Castle here:

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Castle, Television, ABC