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

A surprise visitor gives Harry an introduction to marriage, a stressful human institution he needs to familiarize himself with.

Harry and Asta attend an alien convention.

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

An alien hiding in a small Colorado town meets the locals when they ask him to help solve a murder.

Harry travels to the Ute Reservation to help Asta's grandmother, and along the way, learns what it means to belong to a community.

Fearing he's facing failure, Harry enlists an unlikely ally to help find his ship.

Harry must rely on Asta and D'arcy for survival.

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.

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

It's a surprise party as everyone gathers to celebrate Harry, but some dangerous guests cause havoc.

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

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

Harry copes with jealousy when the mayor hires an annoyingly perfect new town doctor.

Harry and Asta find what they are looking for but not what they need as danger closes in.

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

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

Halloween comes to Patience, and Harry sheds his human mask. Meanwhile, Ben is trying to promote the new resort to the residents of Patience and meets some resistance.

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

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

After losing the alien baby, Harry learns which alien race is on Earth and it’s not what he expected.

Harry and Asta travel to New York looking for one of his people, but things go horribly wrong.

Asta is overwhelmed with guilt after she, Harry, and D'arcy get rid of the dead body.

Harry goes head-to-head with one of his biggest enemies.

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

Harry and Asta's trip is interrupted by an uninvited relative as the town celebrates family.

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

Asta helps Harry learn how to deal with his newfound fear of death.

Asta tells Dan about the shooting while Harry learns what it takes to be a good friend.

Is Harry building another bomb? Asta is going to find out as they go camping on the reservation.

Harry meets a woman unlike any other and realizes that she is the key to his new mission.