Heat

In this episode, Clark discovers his heat vision as he faces a beautiful gold-digging black widow with pheromone powers. The villainess gained her powers from Kryptonite, which explained why they didn't work on Clark. Or at least the Green Kryptonite didn't. But a different Kryptonite, like Red, could have different effects. Or she could seduce someone else. Also her powers works on attraction, so while she only used them men they could work on women if they aren't 100% straight.

So we watch as this lost version of the episode begins...