In the Final Episode of the BIG O, Big O faces the 3rd Big Fau. Roger won against Alex Rosewater and Dorothy saves his life. Angel plans on wiping out Paradigm City memories once again, but Roger stopped her and tells her to become a good human being.
The show can't end like this. There are few mysteries that are left unresolved! Can the show really end like this?! That's why the last episode is called "The Show MUST go ON!" I believe the series is still "Unfinished".