Blue Bloods (Friday, 10/9c, CBS)
This week, it's Erin the assistant district attorney who's in the family's crosshairs — and if you've been watching this Friday night hit, you know the dinner-table debates in this multigenerational crime-fighting family are a weekly highlight. What's got the Reagans riled up this time? Erin's methods in taking down a notorious gang leader, which involves using his goody-two-shoes brother as bait.
The Simpsons (Sunday, 8/7c, Fox)
One of TV's most beloved traditions, the "Treehouse of Horror" trilogy, celebrates its 21st edition — delayed a week past Halloween because of baseball — with Daniel "Harry Potter" Radcliffe supplying the guest voice in a Twilight spoof as a mysterious new student who catches Lisa's romantic fantasy before revealing himself as a vampire. House's Hugh Laurie also guests in a seafaring fable as a sinister castaway rescued by Homer and Marge on their second honeymoon.
Boardwalk Empire (Sunday, 9/8c, HBO)
In a pivotal episode of this evocative period piece, Nucky makes political connections (including future short-lived president Warren G. Harding) while in Chicago for the Republican National Convention. But he's soon distracted by a violent incident back in Atlantic City that escalates the mob war — and may end up bringing Jimmy Darmody back home. But what fans may end up talking about most is the smackdown between the proud Margaret Schroeder and Nucky's perpetually whiny sexpot Lucy.
The Walking Dead (Sunday, 10/9c, AMC)
The pace picks up in the second episode of this intense horror drama as lawman Rick Grimes meets up with some fellow humans foraging in the mean zombie-ridden streets of Atlanta. Holed up in a store (but with none of the campy satire of George A. Romero), the survivors plot an escape route while contending with a racist bully (Michael Rooker) in their midst. The way out involves one of the most unnervingly disgusting actions I've ever seen on TV, prompting this memorable line: "We need more guts."