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 devises several clever methods of silencing Max, but he's soon got bigger problems: Two mysterious agents arrive, looking for him.
Agents Lisa and David find an eyewitness who is less than reliable, while Harry races to conceal evidence of his real identity from the authorities.
Max's parents invite Harry to dinner in an effort to convince their son that the doctor is not an alien, but the night goes in a different direction.
When the real Harry’s wife visits, the alien asks her for a divorce. Sahar persuades Harry and Max that a truce is in both their interests.
Harry experiences jealousy when a kindhearted new doctor arrives in town. Gen. McCallister's agents seize Harry's spaceship.
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.
After crash-landing in Patience again, Harry's not himself — until an octopus lends him a tentacle. Max and Sahar try to guard Harry's ship.
Harry builds a shelter in case his people attack. Asta urges him to make more friends. Sheriff Mike suspects Harry of involvement in Sam's death.
The women of Patience gather for an empowering night out on the town. Harry tries to seduce Carlyn, a scientist with access to technology he needs.
Asta goes camping on the reservation with Harry, who has built a transmitter to contact his people. Liv realizes that she has a gap in her memory.
When a teen runaway arrives in town, Harry learns that the real Dr. Vanderspeigle had a daughter — but his attempts at human parenting fail miserably.
A mysterious clue received by Harry's radio device leads him and Asta to New York City. But first, he must honor a distant relative's final request.
In New York, Harry and Asta search for the elusive street artist Goliath, who they have linked to Harry's species. Mike and Liv reopen a murder case.
A surprise birthday party for Harry brims with hidden agendas and secrets. Meanwhile, he and Asta try to catch a hungry alien hatchling.
Harry accepts the mayor's offer to become the town doctor again... so he can manipulate a murder probe. An assassin hunts Gen. McCallister and David.
Goliath's alien baby inhabits the body of a local youth who vanished 81 years ago. Asta realizes that Harry erased an unpleasant memory from her mind.
Gen. McCallister tests the sphere. Harry continues searching for the alien baby, while Asta feels burdened by the heavy truths only she knows.
Most of the town comes together in opposition to Ben's plan for building a resort in Patience. In the future, a lonely Harry makes a bold decision.
Harry identifies the rival aliens posing a threat to Earth, and tries to warn them away. Asta meets her biological mother. D'Arcy returns to skiing.
At Liv's invitation, an alien abduction expert who can see Harry's true form arrives in Patience — and now Max doesn't know who he can trust.
To retrieve the prisoners locked up at Gen. McCallister's secret Wyoming base, Harry and Asta team up with an unlikely ally: former abductee Peter.
The alien baby reveals both Goliath's true identity — and the real alien threat facing humanity. D'Arcy demands the truth from Asta.
Harry works with Gen. McCallister to uncover more information about the Grey aliens and uses Asta to get closer to a target.
Asta continues to see Joseph, and D'arcy joins Harry in investigating the Grey aliens — but the two of them get into trouble along the way.
Hoping to gather intelligence about the Greys' plans, Harry tags along with Ben and his family on a trip to Yellowstone.
Harry's crush on a visiting alien distracts him from his mission. Meanwhile, Mike and Liv search for the truth behind what happened to Peter Bach.
As Harry and Heather get to know each other, they surprise D'arcy and Asta with a drastic decision that clashes with the group's original plan.
D'arcy and Asta have a heated argument while helping Harry with his overbearing emotions. Mike helps Liv stand up to her grandmother.
Asta learns more about her family history. Harry attempts to tame his very angry child who has come back to confront him.
D'arcy goes on a solo mission. Asta and Harry team up with an unexpected ally to find her — and save the world from the Grey aliens.