In his first week at the clinic, Harry struggles to diagnose a strange feeling: human emotion.

Harry races to keep his secret safe as Asta is forced to face her own past.

On the verge of completing his mission, Harry faces his own humanity.

Harry the alien is back on Earth and doesn't remember who he is, and only Asta can keep him safe.

Harry has a plan to save Asta and himself but he must first attend the Sheriff's poker game.

Harry has an unexpected partner as he tries to infiltrate a military base to find his alien baby. Meanwhile, Asta and Dan help D'arcy to recover and realize, that she's unwilling to leave her new comfort zone.

Harry comes face to face with his greatest enemy and makes a choice that may affect Earth forever.

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

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

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