To return from a time trip to Colorado in 1864, the Szalinskis must help an alien recover his starship from a ruthless gang, who master the alien's weapons and defenses.
- Invention of the week: Time Hopper used, but not emphasized
Starts with a collage aged Wayne finding a meteorite, which is composed of what he calls Szalinskium. This becomes the basis for all his future inventions.
The family travels in time to the old west, to observe a comet and end up altering the time line. The comet turns out to be a spacecraft carrying Arnox, an intergalactic ranger of the seventh order. Desperados find the ship before the Szalinskis get there. The Szalinskis and Arnox must then retrieve the ship and sophisticated weaponry from the outlaws and reset the time line. Of course, there is a showdown . . .