Aliens in the Wild, Wild West is a science fiction

Science fiction

Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities...

 movie released in 1999. It was directed by George Erschbamer and written by Alon Kaplan.

Plot

Aliens in the Wild, Wild West takes place in a mid-19th century western town which had been traveled to by two modern day siblings through the means of time travel

Time travel

Time travel is the concept of moving between different points in time in a manner analogous to moving between different points in space. Time travel could hypothetically involve moving backward in time to a moment earlier than the starting point, or forward to the future of that point without the...

. The younger sibling, Tom Johnson (Locke), was an annoyance to his older sister Sara (Pope). They fought all the time, which is what got them put into the town. While back in time, Tom finds an alien spaceship

Spacecraft

A spacecraft or spaceship is a craft or machine designed for spaceflight. Spacecraft are used for a variety of purposes, including communications, earth observation, meteorology, navigation, planetary exploration and transportation of humans and cargo....

 in the forest. He soon finds out that oxygen

Oxygen

Oxygen is the element with atomic number 8 and represented by the symbol O. Its name derives from the Greek roots ὀξύς and -γενής , because at the time of naming, it was mistakenly thought that all acids required oxygen in their composition...

 is poisonous to the cute and fuzzy aliens, and they only breath sulfur

Sulfur

Sulfur or sulphur is the chemical element with atomic number 16. In the periodic table it is represented by the symbol S. It is an abundant, multivalent non-metal. Under normal conditions, sulfur atoms form cyclic octatomic molecules with chemical formula S8. Elemental sulfur is a bright yellow...

. The cute and fuzzy aliens resemble a cross between E.T. and a hairy Yoda. The voice of the youngest alien highly resembles Elmo. When the townsmen find the aliens, they try to sell them to a representative of P.T. Barnum. Tom and Sara see that this is immoral and try to save the alien by getting it back to the ship. The moral shift appears to be out of character for Sara since we were first introduced to her after she was caught joy riding in a stolen car with her punk rocker convict boyfriend. After the two siblings are successful in their moral crusade, they are transported back into the modern day ghost town

Ghost town

A ghost town is an abandoned town or city. A town often becomes a ghost town because the economic activity that supported it has failed, or due to natural or human-caused disasters such as floods, government actions, uncontrolled lawlessness, war, or nuclear disasters...

 from whence they came. Tom and Sara's sour relationship heals as they drive back to their suburban home.