A quick rundown of the highlights (Caution: Full o' Spoilers):
Aaron Ashmore (Jimmy Olsen) and Laura Vandervoort (Kara) make the credits; Annette O'Toole (Martha Kent) does not.
Chloe's meteor power is not only to sacrifice herself to bring others back to life. She can also rise from the dead.
Supergirl shows up without explanation on Earth and saves a drowning Lex.
Someone drags Lionel off a piece of driftwood.
Bizarro's weakness? The yellow sun.
Lana is living in disguise somewhere in Asia.
After five seasons wanting more realism from Smallville, I've learned to enjoy its over-the-topness. I wonder what's in store this seventh (final?) season.