Easter egg: If you watch this episode until the brain teaser is shown, then at this moment solve the brain teaser (ie press 6 on the DVD remote) then you open a menu to activate a secret commentary.
![The Simpsons](/images/titles/3000-3999/3501_sm.jpg)
The Simpsons (1989)
1 easter egg in season 9
![The Simpsons mistake picture](/images/screenshots/38000-38999/38696_sm.jpg)
The Simpsons Christmas Special: Simpsons Roasting on an Open Fire - S1-E1
Continuity mistake: Lewis changes from black to yellow when Milhouse dares Bart to pull Santa's beard off. (00:14:10)
Tree House of Horror X - S11-E4
[The Simpsons are driving down a road as fast as possible.]
Homer: Dear God, it's Homer. If you really love me you'll save my life now.
[The gas needle immediately drops to empty and the car stops.]
Homer: D'oh.
![The Simpsons trivia picture](/images/screenshots/36000-36999/36317_sm.jpg)
Trivia: Maggie scans as $847.63 in the supermarket at the beginning (not NRA4EVER, as Troy Maclure asserts in 3F31 "The Simpsons 138th Episode Spectacular), the price it costs to feed and care for the average American baby every month.
Question: Which episodes feature the "Howling Dog" (usually used on outside shots of buildings)?
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