Coworkers learn the hard way that not even Siri can help them, a mother and Son try their luck as their Cash Cab doomsday clock runs down, and two sisters from the Midwest try to make it rain green despite exclaiming to Ben, "We're not that smart!"

Two brothers from Jersey brush up on their German and French History, a group of friends shake things up with a video bonus they'll never forget and two roommates are schooled on their heavy metal knowledge.