Homage to 1978 'Invasion of the Body Snatchers'

Most obvious: the Chinese neighbor who says there is a problem with his wife, who peers at him from behind a curtain. When asked by our protagonist what's wrong, he replies, "She exists." A virtual xerox of the Chinese laundry scene in its predecessor. "My wife -- she wrong! THAT NOT MY WIFE!"

In the subway car an old woman with hard eyes looks over a quiet lone passenger and declares, "He's one!"