S1, E4: Things really take off when the Parker Brothers develop the first ever all-electric, inter-stellar planet rover for new client AutoTrader.com. But when Marc kicks Shanon out of the shop, Shanon takes off on a family vacation. But of course, Shanon's penchant for crazier designs doesn't take a day off and Marc must tear apart the build to accommodate his brother's new, imaginative concept. Everyone on the Parker Brothers Team tries to literally shoot holes in the new design, but once the 500 horsepower rover goes for a test ride, it’s a power outage that could pull the plug on finishing this build.