Question: Obviously the film is fictitious but surely the melting of the ice caps would not start the evolution of sea monsters, would it? Also, most smaller species would die off so there would be no food for the monsters to survive.
Question: Where and why did Gregor go? If he was going in search of dry land, why has he not gone earlier? Why did the mariner not try to find him, as he could have been a useful person to have on the boat and was a friend of the females? Why did the smoker's plane not shoot down Gregor?
Question: How did the Smokers track down the Mariners boat whilst they dived to the city? The Deacon shoots the Mariner and then when he notices that he's bleeding he says "Bring me the trackers " Whilst the Mariner and Helen are underwater, Enola sees something that looks like shark fins go under the boat.