Continuity mistake: When Detective Shale knocks at Fred's door, he is wearing a blue suit, but when he enters the door, his suit is now yellow.
Continuity mistake: When Fred and Wilma are in their beds, you can see that the holes in the dial of the phone are in a diagonal position, but when we see a close-up of the phone, the holes are now straight.
Answer: The ratings had declined in its last few seasons, and the series was cancelled.
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