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.

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.

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.

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.

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

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

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 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.