The House of No Tomorrow

While at Sassy Cat Land, the theme park dedicated to Sassy Cat (and to ridiculously long queuelines), Billy, Mandy and Grim stumble upon a closed attraction, a futuristic "house of tomorrow". Inside, they find Master Control, an intelligent computer claiming to know everything (and wishing death upon the trio when Billy angers him), and Tom Smith, a tour guide that became trapped in the house when it closed 40 years ago. Tom explains that the attraction closed when a kid, actually Billy's dad, annoyed Master Control with his dumb questions, and the robots started attacking the humans. In the end, Billy, Mandy and Grim exit the house unharmed, but Tom misses his opportunity to escape and is left behind again.

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S04E06 - Happy Huggy Stuffy Bears