Sunday.
Pretty sure Clark threw the stone before Lana discovered the ship. Having not seen any Superman movies as an adult except Superman 2, I don't know what half the stuff the fansites are speculating about means (Fotress of Solitude, mad enemy guys, etc).
One thing I hate about Smallville is how at least 50% of every season is taken up with 'filler', these one-off episodes which have zero bearing on the story arcs. Then we get finales like this one and last season's, cracking episodes.
btw was Superman 2 as bad as it seems now when it was originally released? I know it was 1980's but feck me it's a turd of a movie.
KNEEL BEFORE ZOD!