Below Deck Mediterranean will be going through some changes - and bosun Nathan Gallagher has to make the decision after a "very dangerous" incident with guests. During the Monday, October 20, episode of the hit Bravo series, Nathan struggled with his deck team: Max Salvador, Christian Trimino and Tessa Budd. He questioned how long they could deal with mistakes including Tessa forgetting to fill a jet ski up with fuel. The situation got worse when Nathan instructed Christian to watch over the guests at night.