![Eureka!](https://image.tmdb.org/t/p/w342/XOoVyYtPqoUsHMVqMvkQACJPIT.jpg)
2 Season
30 Episode
Eureka! - Season 2 Episode 4 The Screw and the Wheel
All machines in the world can be traced to just two: the inclined plane and the lever. Even the wheel is just a circular lever whose fulcrum has become an axle. The screw? It's just a spiraling inclined plane.