Martins death was terrible. Legends spent the entire season leading up to him leaving to be with his wife and daughter then the crossover killed him off. He was killed by a random Nazi who shot him. His death was so unnecessary and probably only happened because they wanted to add a shock to the show, killing someone during the crossover but it was just depressing. It was kind of obvious when he was part of the crossover but still, it wasn't a very good ending for him.