plot explanation - Ending of Shutter Island - Movies & TV

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In Shutter
Island, it's hard to understand the ending because it's quite
ambiguous.

I think, a while before
the ending of the movie Teddy confessed to Dr. Cawley as, he's Andrew Laeddis and he
killed his wife. Then, he walked with Chuck in the final scene.

What's the significance of this
scene?

Was Teddy really
cured? If he was cured, why didn't they just arrest him for the crime of
killing his wife?

What's the significance of Dr.
Cawley's eye gesture at the final scene?

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class="normal">Answer

My answer
is just the opinion of me, and not based on hard proof. That said, I think Teddy was
really cured, but he just pretended that he was still investigating the case. That way,
he wouldn't get arrested for killing his wife and could just "role-play" his life again
and again without arousing any
suspicion.

For your second question,
I think Teddy just made his game (pretending he wasn't cured) seem more realistic. His
conversation with Chuck before getting up and walking away convinced Chuck that Teddy
really is not cured. That may be the reason Chuck looked at the
doctors(?) and slowly shakes his head while maintaining eye
contact.

Another theory is that (for your 2nd
question), Teddy just confessed his cure to Chuck in that conversation before getting up
and walking away. But Chuck decided not to tell the doctors(?) of Teddy's cure. 'Cause
if he did that, Teddy would definitely be locked away. Teddy's
constant role-playing with Chuck may developed some connection (pity? friendship?)
between them- and Chuck decided not to give up
Teddy.

This is just my opinion and the way I
interpreted it and may be wrong.