Harry and Asta team up with an unlikely ally to try to save the Earth.

Harry and Asta get surprise visits. Ben grows suspicious of Mike and Liv's private investigation.

D'Arcy inserts herself into Harry's mission, while Kate grows more uncomfortable in her own home.

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

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

In an attempt to gather information on the Grey Aliens, Harry puts Asta in harm's way.

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.