Doppelgängers appear on the screen exactly at the moment when Adelaide notices the time on the clock — 11:11. But an attentive viewer might notice these numbers before this obvious clue, when they were shown either explicitly or in a hidden way:

- In one of the first scenes, Adelaide chooses a T-shirt with the number “11” at a market as a birthday present.

- The same character meets a man at the beach with a sign in his hands. And the sign says, “Jeremiah, 11:11.” This is a reference to the Bible. The precise quote is, “I am about to bring upon them a disaster that they cannot escape. They will cry out to Me, but I will not listen to them.” At this time, we can predict that the characters will face something they won’t be able to handle.