Marty is Rick’s younger brother and has always looked up to him. He’s also shared Rick’s interest in Oak Island since childhood even though he’s a bit skeptical that anything was ever really buried there. He wants verifiable proof that major works were done on the island prior to the first treasure hunt in 1795 and also worries that Rick will fall victim to the island’s obsessive nature.
Nevertheless, it is Marty who is primarily financing this adventure. He’s an engineer who made millions in the energy business and now wants his older brother to accomplish his dream, too.