“Harry Potter” is everywhere, on virtually every screen in America. Even yours. Daniel Radcliffe stars in the 2002 “Harry Potter and the Chamber of Secrets” (7 p.m. today, ABC). A blockbuster film based on the best-selling book series by J.K. Rowling, “Chamber” hardly required critical word-of-mouth to sell tickets, but the critics weighed in nonetheless. And while their verdict was generally positive, there were many dissenting voices.

Roger Ebert called it “a glorious movie … brimming with invention and new ideas.” Entertainment Weekly and Variety praised the film for its “darker” elements, while other outlets championed its ability to appeal to adults.

On the other side of the critical cauldron, some questioned the film’s very pedigree. The Los Angeles Times castigated “Chamber” as “the illegitimate offspring of ‘Alien’ and ‘The Absent Minded Professor.”‘ One “Film Threat” critic praised it, while another dismissed it as a mere “Scooby-Doo” episode. The Washington Post was harshest, slighting it as “big, dull and empty.”

Today’s highlights

¢ A believer in aliens vanishes on “Without a Trace” (7 p.m., CBS).

¢ A holiday meal takes only one hour to prepare on “Rachael Ray’s Thanksgiving in 60” (8 p.m., Food).

¢ Scheduled on “48 Hours Mystery” (9 p.m., CBS): A true tale of a Halloween-night beauty-queen massacre.

¢ Eva Longoria plays host to “Saturday Night Live” (10:30 p.m., NBC), featuring musical guest Korn.

Sunday’s highlights

¢ Scheduled on “60 Minutes” (6 p.m., CBS): New Orleans’ sinking state; Internet gambling; U2.

¢ Monumental disaster strikes when a cruise ship flips upside down on the 2005 disaster movie remake “The Poseidon Adventure” (7 p.m. Sunday, NBC).

¢ “Nature” (7 p.m., PBS) looks at Katrina’s “other victims,” the thousand of wild animals and pets left injured and homeless by the natural disaster.

¢ The boys from Fenway pitch in on “Extreme Makeover: Home Edition” (7 p.m., ABC).

¢ Worries about a strange intruder on “Desperate Housewives” (8 p.m., ABC).