I said I would post episode list here, since many have the American rerelease box sets with no episode lists or even numbers listed on the discs, so you all might be able to more easily find the episodes you're looking for. EDIT: I just noticed upon investigating Down's copies that the discs for season 1 aren't labeled. Adding disc descriptions.
You're welcome to post short summaries for the episodes in the replies to this thread and I can add them to the list for people.
It reminds me that I should try to do the detail summaries again. It would be a good excuse to rewatch the series.
Season 1
As translated by Anime Works/Media Blasters... (complete with glories such as 'Rune-God')
Disc 1: Daybreak (Red with Hikaru and Mokona)
1. The Birth of the Legendary Magic Knights!
2. Presea, The Master Smith In the Forest of Silence
3. Ferio, The Handsom, Mysterious Swordsman
4. Alcyone, the Vengeful Sorceress
Disc 2: Sunrise (Green with Fuu and Ferio)
5. Escudo, the Legendary Ore
6. Lives at Stake - Presea's Weapons
7. Ferio in Desparations - A Romance in the Desert
8. The Horrible Trap of Summoner Ascot
Disc 3: Noon (Blue with Umi)
9. The Magic Knights' Greatest Crisis
10. Revival of Selece, the Legendary Rune-God
11. The Legend of the Rune-Gods - In Cephiro, Another World
12. The Fearsome Illusionist Caldina
Disc 4: Twilight (Orange with Caldina and Ascot)
13. The Most Valuable Thing in this World
14. Hikaru, Umi, and Fuu's Unyielding Wish
15. The Second Rune-God: Windam, the Lord of the Skies
16. A Powerful Foe! Lafarga the Swordsmaster
Disc 5: Midnight (Purple with Emeraude and Zagato)
17. The Truth About Inouva, and the Return of Memories
18. The Last Rune-God: Rayearth, the Lord of Fire
19. Showdown! The Magic Knights Versus Zagato
20. The Unbelievable Truth About the Legendary Magic Knights!
The newer DVD release seems to have a bonus disc of special features which is dark blue.