Stranded in the town of Patience, Colorado, an alien inhabits the body of Dr. Harry Venderspeigle — but one resident can see past his façade.

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.

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

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

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

After he makes a mess of his human life, a depressed Harry gets drunk. Liv quits the force when Mike fails to credit her for solving a crime.

Asta saves a badly injured Harry after they fall into a glacial crevasse — and in the process learns a shocking secret.

To repair his planet-killing device, Harry visits an alien convention to harvest implants from UFO abductees. Mike asks Liv to rejoin the department.

Brokenhearted when Asta ends their friendship after discovering the real Harry’s fate, the alien decides to fulfill his original mission.

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

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

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

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

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

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

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

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.

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.

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

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

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.

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

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

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

Harry must escape an outer space prison to stop a dangerous threat in town.

Harry and Asta work together to try and get something Harry desperately needs.

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.

Harry struggles to find balance with his new human form.

Harry is brought in front of The Galactic Housing Council to answer for his crimes.

Harry has to prove himself to someone from his past.

Harry enlists an unlikely ally to help him save Patience.

With lives hanging in the balance, Harry is put to the test.

Harry faces one final threat, and one that forces him to use more than just his alien strength.