The post for the episode thread is incorrect. It was “Best Kind” that aired, not “Criminal Rex”

When businessman Jake Kaufman is found dead on his yacht, all suspicion falls onto a deckhand who ran from the scene. As Mark and Rex search for motives and clues, it seems that the businessman's missing watch might be what the killer was after… But with Rex being unable to find traces of the watch on any of the suspects, the hunt for the elusive watch and the killer becomes a race against time to save another life.