While an incredible new discovery is made in thetriangle-shaped swamp, Rick Lagina and members of the teammake shocking connections in Italy between the Knights Templarand the Oak Island mystery.
Athena and the 118 race to rescue when a wedding proposaltragically intersects with a bank robbery, and then when aprincess bride is literally stuck on her way to the altar.Athena talks a victim thru her grief; Maddie takes mattersinto her own hands as Buck finds a surprise visitor on hisdoorstep.
Olivia gets an exciting opportunity but has to decide if thetiming is right for her to make a big leap. Coastal footballtraining forces Spencer, Jordan and Asher to go look in on JJwho has been off the grid. Patience contends with majorramifications after she fails to heed Layla's advice about her#1 fan.
Calvin and Marty are surprised when their new business sparksprotests from residents concerned about gentrification. Also,Grover's family tree project reveals fresh details about thewhereabouts of Dave's estranged father, who left when he was achild.
While Hunt and Dorothy entertain Liddy and his wife Fran attheir exclusive country club, their kids Lisa and Saint Johnpaint a less-than-perfect portrait of the family. Later, onthe outs with Nixon's Attorney General John Mitchell, Hunt andLiddy get a chance to redeem themselves when a leaked memo fromDita Beard puts Mitchell and the administration in legaljeopardy.
Sue, Jenna and Brooklyn are the first, second and third wivesof Gavin, a charming doctor who's made a fortune sellingall-natural vitamins - and broken all of their hearts along theway. Now, they all share the same fantasy: they want Gavin tounderstand - to feel for himself - the pain he's caused themall. Meanwhile, Roarke brings Ruby's youngest daughter, MJ,to the Island to help Ruby remember who she is. And hopefullykeep her from disappearing into the ocean forever with Isla...as a mermaid.