Steven Spielberg’s Disclosure Day isn’t just the master filmmaker’s return to the summer movie season after a decade-long break.

In “Disclosure Day,” out Friday, Steven Spielberg is once again inviting audiences to ponder the existence of extraterrestrial life — and the implications it would have for religion on Earth.

We follow Daniel Kellner (Josh O'Connor), a cybersecurity specialist who has defected from the "baddies", and Margaret Fairchild (Emily Blunt), a TV weather reporter who unwittingly becomes host to al...