But did everyone REALLY catch what happened? Spoiler When Miguel walked into the room to give the convict the handcuff key, he said "It ends here". And when Miguel actually gave him the key, he said something like "and now you need to stop sending threats to me and my family". So apparently this wasn't all about helping Dexter, like Dexter was led to believe. Miguel helping to kill the convict was more about helping himself!!! Miguel never even admitted to Dexter that he had a history with the guy.