ECT
| Date | Clue |
|---|---|
| 2022-08-12 | Outer: Prefix |
| 2018-09-22 | External: Prefix |
| 2015-12-10 | Build |
| 2013-03-07 | Outer: Prefix |
| 2012-11-13 | Outside: Prefix |
| 2012-02-17 | Outer: Prefix |
| 2010-11-12 | External: Prefix |
| 2006-05-28 | Outer: Prefix |
| 2005-08-07 | Outside: Prefix |
| 2004-03-05 | Outside, at the outset |
| 2002-09-15 | Outer: Prefix |
| 2002-08-16 | Outer: Prefix |
| 2000-08-12 | Outer: Prefix |
| 1997-10-11 | Outer: Prefix |
| 1997-01-25 | Outer, at the outset |
| 1995-09-16 | Outer intro |
| 1995-08-19 | Without: Prefix |