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

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

Harry accompanies the Hawthornes to Yellowstone to find out what the Greys are up to.

Harry tries to bond with Heather, aka the Avian alien.

Harry and Heather draw closer and plan to leave Earth together, leaving the planet at the Greys' mercy.

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

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