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

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.

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

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.

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.

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

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.