Past Perfect Prediction

S4, E4: Convinced that the last piece he needs to activate his powerful new machine is hidden in Slider's garage, Hacker threatens to evict the teen unless he pays up on an old debt. Enter the kids and Digit. As a way to raise the money, they convince Slider to open the garage for business, just like his dad did. They do, but quickly discover that there's more to it than meets the eye. Can they unlock the past to find the key to saving Slider's future?