Okay, I lets try this prompt again because I really want to see what would happen if our favorite blind vigilante of Hell's Kitchen meets the vigilante serial killer of Miami!

Dexter is somehow in New York (some type of convention for blood analysts, someone's wedding or whatever) and happens to meet Matt (who becomes his unofficial guide around New York). Along the way, Dexter finds a potential kill. He does his research and finds out his next victim lives in Hell's Kitchen. Coincidentally, Matt is also after the same guy and walks in on Dexter in his kill room right before he goes for the kill.