A series of crises on Mitch and Cam's wedding day put Pepper to the test. Meanwhile, Phil gets an eye procedure before the celebration, and Claire embraces the role of best woman.
A shuttle accident leads to Spock's Vulcan DNA getting removed by aliens, making him fully human and unprepared to face T'Pring's family during an important ceremonial dinner.
The search into the disappearance of a marine lieutenant continues, as the NCIS team track them down to Afghanistan. Meanwhile, Tony's deepest fear resurfaces and Gibbs has to go through memories of his past again.
The team travel to Morocco in the hope of finding a retired couple from Idaho who were abducted on a cruise.
Richard Castle thinks a murder is a voodoo ritualistic murder when a silver coin is found in the mouth of an adult male murdered victim. When other deaths pop up including a young girl with a silver coin in her mouth, it's up to the team to find the connection.