Just as millions of Americans will be lining up unwanted goods on their stoops and driveways this Memorial Day weekend, CBS and NBC will begin the annual process of burning off episodes of canceled shows during the summer months when ratings don’t really matter as much.

”Harry’s Law” (7 p.m. Saturday, NBC) had some ardent fans, but not enough of them, apparently. Those who watch the repeat on Saturday can watch Sunday’s series finale (7 p.m., NBC), which should clear up viewer confusion about Harry’s ex. Unless NBC decides to yank the show again to air something else.

The police drama “NYC 22” (8 p.m. Saturday, CBS) debuted very late in the season, a clear sign that the network lacked confidence in the show. And its instincts were correct. Catch a new episode Sunday (9 p.m., CBS).

• Hosted by Tom Brokaw, AMC’s Memorial Day War Heroes Weekend includes director Clint Eastwood’s bookend 2006 movies “Flags of Our Fathers” (7 p.m. Saturday) and “Letters From Iwo Jima” (9 p.m.), recalling the bloody Pacific Theater battle from both sides.

• In a less august movie pairing, “The Dukes of Hazzard” meets “Good Times” as John Schneider and Jimmie “Dyn-o-mite!” Walker star in the 2011 beach-blanket terror-palooza “Super Shark” (8 p.m. Saturday, Syfy).

• Lifetime dedicates the long weekend to movies and miniseries about love, betrayal, revenge and murder. Sordid matters kick off with the four-hour 1994 miniseries “Bitter Blood” (11 a.m. Saturday), starring Kelly McGillis and Harry Hamlin. Other highlights include the premiere of the 2012 shocker “Shadow of Fear” (8 p.m. Sunday), starring Will Estes as a coffee shop employee obsessed with his co-worker.

Today’s other highlights

• The Boston Red Sox host the Tampa Bay Rays (6 p.m., Fox).

• NBA Conference Semifinals (7 p.m., ABC).

• A greeting card writer (Joseph Gordon-Levitt) wonders how he lost his girl (Zooey Deschanel) in the 2009 romance “(500) Days of Summer” (8 p.m., Style).

Cult choice

After their fatal crash, two ghosts (Cary Grant and Constance Bennett) help a forlorn husband find fun in the 1937 comedy “Topper” (9 p.m. Saturday, TCM).