Mr. Burns gives all employees augmented reality glasses (a parody of Google Glass) to spy on them. Homer then uses them to spy on people and discovers that Marge sees a marriage counselor in secret. Nelson makes Bart find him the best Valentine's Day gift, but if Bart doesn't succeed in his task Nelson is going to force feed him to an electric pencil sharpener. 
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It starts with a Christmas flashback from 2013,Homer decorates his tree while singing a song. Mr Burns gives Homer and the power plant workers oogle goggles, little do they know that they are being spied on by Mr Burns through the specs.