Raging Abe Simpson and His Grumbling Grandson in "The Curse of the Flying Hellfish"/References

Trivia

 * Although Grampa's military unit was known as the "Flying Hellfish," both the elaborate headstone and stationery letterhead read "Fighting Hellfish."
 * When Mr. Burns accidentally smashed Lisa's room after acquiring the Tombstone keys, Lisa mistook Mr. Burns for Santa Claus.

Goofs

 * Mr. Burns was younger than Abe in this episode, but in newer episodes Mr. Burns was older.
 * How did Burns know which house Abe was hiding in?
 * Doesn't the familiy visit Abe on Sundays, as seen in Old Money?
 * Where was Abe's tatto eariler?
 * How did the State Department know where to find the pictures being hidden all those years at the same time as Abe since he never told anyone else besides Bart?
 * The safe doesn't appear to be air-tight and water-proof, as seen with Bart, yet the pictures stayed intract.
 * There wasn't any dumpster near the Simpsons' place before.
 * How did Burns know Abe lives in a rest-house?