Is romance a con game? The Lifetime movie “Who Is Clark Rockefeller?” (8 p.m., today, Lifetime) invites the question.

Eric McCormack (“Will & Grace”) has a great time starring in this ripped-from-the-headlines story. He’s Clark, or at least he says he is, the eccentric scion of a billionaire’s family who wins and woos ambitious Sandra (Sherry Stringfield), a Harvard MBA student, swept off her feet by his art collection, his townhouse and his mastery of six languages.

Any woman seduced in Klingon should be dazzled easily, but Sandra pushes the envelope in the love-is-blind department. Over the course of many flashbacks, we learn that Clark could never produce a family member to back up his story, and had no Social Security number or other means of identification. Sandra’s clueless nature will leave the police (and some viewers) a tad unconvinced.

As the scenes flash back further, we discover “Clark’s” dark background, and McCormack does a great job of morphing from a chipper fake preppy to a Eurotrash poseur from the disco era. Even if you already know all about the Clark Rockefeller story from extensive news coverage, “Clark” is worth watching for the costume changes alone.

• B-movie king Roger Corman produces and appears in “Dinoshark” (8 p.m., today, SyFy), a tale of ancient predators set loose by melting ice caps. Not even the brain behind “Attack of the Crab Monsters” could generate much excitement with a lukewarm relationship between a dashing ship’s captain (James Frain) and a fetching marine biologist.

• HBO is back. The pay cable network departs from its spate of very, very small comedies to offer viewers “The Pacific” (8 p.m., Sunday, HBO), a big, expensive, ambitious and rewarding 10-part miniseries following the overlapping stories of three Marines (James Badge Dale, Jon Seda and Joe Mazzello) who participate in some of the bloodiest fighting of World War II.

After a brief glimpse at the home-front aftermath of Pearl Harbor, the action picks up at Guadalcanal, where a group of outnumbered and undersupplied Marines hold off the Japanese.

The battle scenes are brief and brutal, but the real drama occurs during the quieter moments before and after the shooting, when the main characters have to balance their more humane impulses with the fight to survive and defeat an implacable foe who would rather die than surrender.

Executive produced by Steven Spielberg and Tom Hanks, “The Pacific” will be compared, and compared favorably, to “Band of Brothers,” a major hit for HBO that has continued to attract strong cable audiences almost a decade after its debut.

Today’s highlights

• Sarah goes job hunting on “Parenthood” (7 p.m., NBC).

• David James Elliott (“JAG”) guest stars on “The Guard” (8 p.m., Ion), a new drama set in the Canadian Coast Guard.

• Scheduled on “48 Hours Mystery” (9 p.m., CBS): a teen’s killer.

• Jude Law hosts “Saturday Night Live” (10:30 p.m., NBC).

Sunday’s highlights

• Scheduled on “60 Minutes” (6 p.m., CBS): A new Wall Street expose; Britain’s musical savant.

• Contestants compete against a ticking clock on “Minute to Win It” (7 p.m., NBC).

• A rare disorder changes a woman’s life on “Help! I’m Turning into a Giant” (7 p.m., TLC).

• Rink melodrama continues on “The Cutting Edge 4: Fire & Ice” (7 p.m., ABC Family).

• “Winning Time: Reggie Miller vs. the New York Knicks” (8 p.m., ESPN) explores one player’s psychological mastery of a rival franchise.

• “Sizing Up Sperm” (8 p.m., National Geographic) examines human reproduction from a radical new perspective.

• Celebrities ascend Mount Kilimanjaro to raise environmental awareness on “Summit on the Summit” (8 p.m., MTV).

• Four chefs enter a comfort-food competition on “Ultimate Recipe Showdown” (8 p.m., Food).

• Death on the docks on “Cold Case” (9 p.m., CBS).

• Kitty receives media scrutiny on “Brothers & Sisters” (9 p.m., ABC).

• A former “Design Star” champ gets his own series on “The Antonio Treatment” (9 p.m., HGTV).

• “Fatal Attractions” (9 p.m., Animal Planet) looks at the people who make the unwise choice to live with lethal pets.

• “America’s Worst Driver” (9 p.m., Travel) looks for vehicular incompetents, nominated by their friends and family.

• Clutter kills romance in the new series “Hoarding: Buried Alive” (9 p.m., TLC).