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On the verge of completing his mission, Harry faces his own humanity.

Harry and Asta attend an alien convention.

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

A surprise visitor introduces Harry to a stressful human institution: marriage.

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

An alien hiding in a small Colorado town meets the locals when they ask him to help solve a murder.

Fearing he's facing failure, Harry enlists an unlikely ally to help find his ship.

Harry travels to the Ute Reservation to help Asta's grandmother and learns what it means to belong.

Harry must rely on Asta and D'Arcy for survival.

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

Harry has an unexpected partner as he tries to infiltrate a military base to find his alien baby.

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

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

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

Harry tries to bond with Heather, aka the Avian alien.

Harry races to keep his secret safe as Asta is forced to face her own past.

Harry accompanies the Hawthornes to Yellowstone to find out what the Greys are up to.

Ben struggles to get the townspeople to accept the resort, while Harry and Asta find out the origins of Goliath.

Harry, the alien, is back on earth but doesn't remember who he is and only Asta can keep him safe.

After losing the Alien Baby, Harry learns which alien race is on Earth. It's not what he expected.

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

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

In an attempt to gather information on the Grey aliens, Harry puts Asta in harm's way.