Series 2 for me will always be the highlight of Knightmare. We were teased with what to expect in the first series and I remember waiting with anticipation every week counting the days down until it started in the Autumn after it was previwed on CITV.
There were several features of season two that stood out, most noteably the sustained presence of Mogdred, Gretal (easily the best maid), the original wall monsters, Folly, Lillith and the Oracle of Confusion. Season two introduced a lot of characters and events that season three would use and hence there impact was diluted.
When you add in the first ever winning quest plus a second victory, both of which quest objects were never repeated (maid and tailsman) then personally season two just cannot be beaten.
I vividly recall going to school on Monday morning after Mark's winning quest and all everyone wanted to talk about was Knightmare.