| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| The "crown jewels" of Alcoa are the bits of this metal that chemist Charles Hall isolated when he was just 22 | aluminum | $400 | J | LESSER-KNOWN SCIENTISTS | 2012-01-27 | #6300 | |
| It wasn't until this metal became cheap enough that Zeppelin could make the dirigible of his dreams | Aluminum | $400 | DJ | SCIENTISTS | 2000-03-17 | #3585 |