Sandwich and Salad

Twenty-eighth episode of season two.

Plot
The episode begins by establishing that Xiao Long's grandfather's spirit, who always helps them find the book of magic, said that they won't be able to find the book today. Xiao Long refuses to cook because he is always put to cook, and the characters start arguing about who will cook. Duke was seeing everything through the crystal ball, and sent a robot to kill the Questers. But when the same robot approaches, the Questers accidentally hit it in the head with an object, the robot falls, and gets up acting like a robot that makes food and offers to make food for them. Meanwhile, Duke looks at the instruction manual and discovers that for the robot to attack the group, he'll have to trick one of them into saying the word sandwich. Meanwhile, on some occasions William says the word sandwich and for a second the robot attacks him, but goes back to his cooking behavior right away. The characters assume that WIlliam is hallucinating. William leaves the group and talks to Xiao Long's grandfather who is playing the psychologist. He asks William if there was any similarity between these moments. William realizes that in each of these moments he said the word sandwich. Meanwhile Duke and Rex approach the QUEsters in disguise, and with a Food Truck (or something that looks like one). Duke says he's doing a promotion and what if they guess what the cartoon he did on the Food Truck. Unfortunately for him, the Questers can't understand that the design represents a sandwich, but then William arrives saying he's got it all and it's a sandwich. And then the robot permanently reverts to its original programming, and attacks the Questers. Duke removes and disguises and reveals everything, but while they're being chased, he scoffs that he just had to make them say sandwich. But that makes the robot attack DUke, it runs away, but says the word salad, and that makes the robot stop, then Duke says "sandwich in the Questers". This makes the rob attack the Questers, but they say the word salad and then speak a similar phrase for the robot to attack Duke. And they stay in it, each makes the robot attack the other, but the robot eats to short circuit. Rex throws water on the robot and then it explodes.