Welcome to the Family Part 2 - S2-E25
Revealing mistake: When the family releases Chloe's bubble ability for the last time in the episode the bubble machine is visible.
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Suggested correction: There is no bubble machine visible.
Suggested correction: There's no bubble machine anywhere. All the bubbles are CG.
Revealing mistake: When the house starts to shake and collapse the picture frames on the table don't move an inch, revealing that it's just the camera shaking.