Best Bets on TV Tonight

"Smallville" (8 p.m., the WB): In the sure-to-be-gripping season finale of "Smallville," Brianiac unleashes a deadly virus and refuses to give Clark the vaccine unless he releases General Zod.
"CSI" (9 p.m., CBS): The life of a "CSI" team member is imperiled when a man accused of murdering his wife and co-workers takes a hostage and barricades himself in a casino hotel room. It's the first in a two-part season finale.
"That '70s Show" (8:30 p.m., Fox): Next week, "That '70s Show" bids farewell to prime time, but not before milking things with a retrospective clip show. Tonight's "The Final Goodbye" special takes a look back at memorable moments and features interviews with cast members, as well as past guest stars such as Brooke Shields, Bruce Willis, Luke Wilson, Lindsay Lohan and The Rock.
"Will & amp; Grace" (8 p.m., NBC): Karen suddenly has a sister (Bernadette Peters).
"Everybody Hates Chris" (8 p.m., UPN): Chris's dad to his family: Get outta my face for Father's Day!
"My Name Is Earl" (9 p.m., NBC): Earl relies on the kindness (and bi-lingual skills) of a working girl to cross a bad deed off his list.