The Old Building is an episode of Hey Arnold!.
- The settings on the wrecking ball: Ready, Get Set, Smash, Ravage, Damage, Wreck, Pulp.
- The wrecking balls are named Big Bertha, Black Thunder, T. Minnie Martoonis, Judgement Day, and The Terminator.
- Ernie gives Arnold a nickname: Bill.
- This is the first episode to have a song playing in the end credits instead of the end theme.
- Grandma is wearing the same outfit she has on in her flashback.
- Grandma yells at Ernie, "come over here and say that, demolition man!". This could be a reference to the 1993 film Demolition Man
- First appearances of Dino Spumoni and Mayor Dixie.
- Grandma's sign and Ernie's model say Circle Theater, but the building itself says Circle Theatre.
- At one point when Arnold is talking to Grandpa on the roof, Grandpa's eyebrows become see through and their outline changes to white.
- At dinner the salt and pepper shakers are beside a glass and all three are white, then during Grandma and Ernie's argument the glass is shown between the salt and pepper shakers and all three have become blue.
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