@Ann: it took me a minute to figure out that ATAI meant "And The Answer Is..." -- I love that episode too! I remember finishing my chores early to sit down and watch it. It's just as excruciating to watch in French as it is in English on DVD a decade-and-a-half later! lol. I'd thought for SURE Clark was gonna tell at last. I mean, it's the LEAST he could've done before freezing Lois, right? Such a lovely episode, that.
Another episode I love, although it's not my all-time fave, is Operation Blackout from Season 2. Why? This.
I just love a Clark in uniform.