3b

"In Season 4, Episode 2: Gone
this is the Episode spolier

The mystery surrounding Chloe's death deepens as Clark and Lois investigate, discovering that Lex Luthor and Lois' abrasive and militarist father, U.S. Army General Sam Lane, are somehow involved. Meanwhile, Lana returns to Smallville after finding out that the symbol that appeared on her back in Paris is also on the cave wall. In prison, Lionel Luthor prepares for his murder trial and sends out a liquid-metal assassin to keep Clark and Lois from investigating Chloe's 'death'

that is the copy of the t-1000 right to the last detail only differance is he was a meteor freak not a robot"

Now that's the episode I was talking abot when I made the Question. right on Deejaydjs.
Horray another person agree's with my observation!

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