Dexter: 10 Unresolved Plot Threads The Revival Must Address

Devastated by his sister's death, Dexter decides against meeting up with Hannah and his son Harrison in Argentina. His apparent demise is reported in the newspapers, and as far as Hannah is concerned, he's gone. Now, the killer is Harrison's sole guardian, and he should be a teenager by now.

No one back in Miami appears to realise that Harrison is M.I.A., but the police or FBI have surely tried finding where the child is. Hannah, meanwhile, is a wanted fugitive, so there's a chance she's on a "Most Wanted" list somewhere too. While it's entirely possible they've managed to disappear in South America, it's hard to believe their story is over.

Remember, like Dexter, a young Harrison witnessed his mother's death and what he went through was almost identical to his father.

That leaves the question of whether he too has become a serial killer, but if so, he's done so without Harry's training. If the show plays around with the timeline, Harrison could even be an adult now, and someone Dexter has to stop. Either way, both his and Hannah's fate need to be addressed.