Plot:
A spaceship lands on Earth.

No flying saucers around here...
Several humanoid aliens emerge and report to their leader. After taking readings, Derrick finds signs of intelligent life. He holds the
captain hostage to keep from reporting that the Gargans can’t graze on Earth. Derrick won’t endanger humans.
Captain gets the drop on Derrick. Inspecting the Gargans, they discover the atmosphere has killed the Gargans. They’ll have
to find another planet and execute Derrick. He manages to escape. .
Captain reports to the home planet and learns that Derrick is the leader’s son. Captain and Thor discover the Gargans aren’t
dead but growing which makes Earth suitable for growing the animals.
The leader wants Derrick caught. Captain sends Thor to retrieve him.
Derrick wanders to the city. Betty and her grandpa meet him and think he want to rent their room.

The rent on the room is only a spleen every other week.
Thor heads into the city and his charming attitude leads him to disintegrating several guys.

Captain Kirk's phaser isn't anywhere as powerful as my laser
disintegrator.
Betty takes Derrick swimming. He explains that her dog was killed. She goes to where Sparky was killed.
Grandpa mistakes Thor as a friend of Derrick’s and tells him where to go.
Betty isn’t sure what happened when she finds Sparky’s skeleton. Derrick convinces Betty to take him to talk
with a college science professor, Simpson.
Thor finds Betty friend. Questioning her about Derrick, he disintegrates her.

A skeleton driving a car and not in a William Castle movie...
Betty and Derrick head on. Betty leaves a note for Grandpa telling him they’re going to the college. Grandpa
tells Thor where they went.
At the college, Betty and Derrick can’t find Professor Simpson. Thor is able to find the professor and vaporizes him.
Thor wants to capture Derrick and have grandpa to help find him. Thor gets in a gunfight and vaporizes several
cops. Derrick looks for Thor who is wounded and hides in a car. Thor forces Derrick and Betty to take him to a
doctor.
Grandpa tells Joe, the reporter the story and that Thor kidnapped Derrick and Betty.
Thor forces the doctor to remove the bullets. Derrick learns he’s the son of the leader and that the Gargans didn’t die
but grew bigger. While Thor passes out, Derrick, Betty, and the doctor escape.
Joe the reporter and a cop head to the mineshaft.
The nurse finds a passed out guy, Thor, in the doctor’s office. Bandaging him and revives him, he forces her to drive him
to safety.
At the mineshaft, the Gargan attacks the cop. Thor arrives. Joe drives off. Thor chases and drives afterwards. He crashes
the car. Joe tells the nurse and the monster in the cave. Thor is taken to the hospital before being taken to jail.
Betty and Derrick search for Thor’s weapon. She realizes that Derrick is an alien. He explains how his people are raised
without families, etc…Finding the weapon, they discover it is broken and can’t be used on the Gargan. Derrick will have to fix
the disintegrator to kill the Gargan and give the weapon to Earth to defend against invasion.
Later, Derrick thinks he can hook the disintegrator to the power lines to stop the Gargan.

Get me some melted butter, and we'll shut Red Lobster out of
business.
He hooks up the lines. Max the power, he vaporizes the Gargan.
Grandpa, Betty, and Joe find Derrick who has Joe take him to Thor. Grandpa and Betty head to the old mineshaft. Derrick
frees Thor from the hospital.
The newscast announces that flying saucers are approaching as people are panicking.
Mine, Grandpa and Betty see Derrick and Thor arrive as the guide ship lands. Captain and the leader greet Derrick who
volunteers to lead the alien fleet to Earth. He orders the ships in too fast and crash.
Grandpa, Betty, and Joe see the wreckage as Derrick’s narration about making Earth his home.