| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| A handkerchief soaked in sodium thiosulfate was used as crude protection from this type of weapon | poison gas | $200 | DJ | WORLD WAR I | 1995-09-26 | #2542 | |
| In 1915, Germany 1st employed this now illegal weapon at the 2nd Battle of Ypres | poison gas | $800 | DJ | WORLD WAR I | 1986-04-29 | #427 |