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One of televisions most prolific serial killers returns to Showtime this Sunday with the premiere ofDexter: New Blood.

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How did he get here?

What events from his past might haunt his present?

These are the key things to remember about Dexter Morgan, the serial killer with a code.

Two, he must not get caught.

If justice cant be delivered through legal means, Dexter will take it with his own hands.

The disastrous final season centered on Ramplings Dr. Vogel and her serial killer son.

According to estimates, Dexter Morgan has killed 138 people, a number likely to rise inNew Blood.

Debra started to suspect Hannah, turning their dynamic into a bizarre triangle.

In the end, he was taken to Argentina by Hannah.

Leaving Miami

Where did we leave Dexter Morgan after all this carnage?