'Way Out S01E04 - Button, Button

The commanding officer of an underground military bunker must decide whether to launch a retaliatory nuclear strike after all communications with the outside world suddenly cease, even though he doesn't know if the country has actually been attacked. Complicating matters is a mysterious sergeant, new to the unit, who seems to know much more about each man in the bunker than he should, and is pressing the officer to launch the strike.