Luke Brunner is a veteran CIA operative who, up until recently, was on the verge of retirement. After his last mission in saving another operative - who just so happened to be his daughter - he's back and face to face with new villains. This one is an old flame from Luke's past who threatens to destroy the world...if she doesn't destroy his life first.

It's a sink-or-swim mission when Luke and the team dive into deadly waters to stop a sinister terrorist from making a massive splash.

A face from the past threatens Luke and Tally's recharged romance. The team breaches a fortified compound to keep vital intel out of enemy hands.

As Greta attempts to loosen Luke's lips, the safe-house gang gets an earful from afar. Emma turns heads on the dance floor with an unlikely date.

While Cress tightens the screws, Chips matches wits with an interrogation expert. A stealth mission makes a bigger bang than expected.

Barry hitches a ride to the final frontier. As an operative's cover story begins to crumble, Luke and Emma seek help from an unexpected ally.

Emma and Luke catch a buzz in a deep-sea submersible. Back on land, bullets and breadsticks fly in a confrontation at a pizza joint.

Every second counts as the team scrambles by land, air and sea to avert a catastrophe. Aldon finds himself outnumbered β but not outmatched.

As the clock ticks down to zero hour, Luke and the crew must break into a top-secret facility before their adversary turns off the lights β for good.