If you like those old who dun it mysteries where a bunch of guests in a remotely located large house find one murdered guest after another and try to figure out which of them is the killer or killers, you may like this show. The action takes place on an ocean liner instead of a house. It also features some Nazi gold and fugitives from war crimes justice. The story has several twists and turns as one person appears to be an innocent victim, and later a villain, and later a victim again, and so on. There are a few instances in which one must suspend disbelief somewhat, but they are not outrageous or too hard to believe. At one point an older man who is being taken to lock up surprises and overpowers a much younger, bigger, and stronger man, a crew member tasked with guarding and transporting him. It is possible, but it didn't really look credible. But compared to most shows, that is nothing.

I've seen season 1 and am starting on season 2 now. Enjoy.