Harry tags along on Ben, Kate and Max's family trip, hoping the mayor will lead him to answers.

Harry gets distracted from his mission, while Mike and Liv make a huge discovery.

Asta and D'Arcy take a drastic step in an attempt to get Harry back on track.

Harry hits rock bottom, Kate begins seeing the truth, and Mike helps Liv face her greatest fear.

Harry and D'arcy travel to an unexpected place to recover an alien device left behind by his people.

Harry and Heather reunite, but their relationship is more complicated than ever.