"Smallville" past and future

Look for Black Canary in this week’s “Smallville,” complete with her fishnet stockings. Last week’s episode was yet another of those episodes where Clark has been replaced by a double or turned evil by magic or red K or whatever. At least this time there was an interesting twist, with the new Clark (the Bizarro Clark) actually more appealing to Lana in some ways than the real Clark. And, hey, how about that Lex, having his own cloned brother killed?