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

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

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

Harry has to prove himself to someone from his past.

Harry enlists an unlikely ally to help him save Patience.

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

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

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

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

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

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

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.

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 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.

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

Harry and D'arcy travel to an unexpected place to recover an alien device left behind by his people.

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