Is there anything duller than home movies of other people’s vacations? That question is put to the test with “All Aboard! Rosie’s Family Cruise” (7 p.m., HBO).

Back in 2004, Rosie O’Donnell, her partner, Kelli, and 1,500 other couples and families embarked on a seven-day Caribbean cruise. They hoped that families of gay people could kick back and relax and not have to face the awkwardness and discrimination that often arises when kids have to explain why they have two daddies or two mommies.

Most of the action here is decidedly mundane. We see couples changing diapers, talking about school, adoption red tape and teenage petulance. A girl raised by two gay women discusses how and when she realized that she was attracted to boys, something her folks insisted was “perfectly natural.”

The only static on the funfest arrives at a beach resort where they are met with a lone man proselytizing against homosexuality on a street corner. He hardly looks like the voice of popular opinion.

The film’s attempt to depict gay families being as dull and normal as everyone else hits a few moments of choppy seas. After all, if you’re out to dispel stereotypes, why kick off the proceedings with a razzle-dazzle show tune (“Anything Goes!”) and then cut to a disco (“We Are Family”)?

It remains to be seen whether gay families will ever be seen as normal or mainstream, but it now seems perfectly normal to take a cruise vacation with a few thousand like-minded people.

Vacationers of every political persuasion seem to want to take to the high seas together. The left-of-center magazine The Nation has sponsored nine cruises to date, presumably to hold seminars on “How to Lose Money and Influence People.” Oliver North invited landlubbers on a 2003 cruise to commemorate the 20th anniversary of the invasion of Grenada. Something to ponder over pina coladas. In 2005, TV talk show host Bill O’Reilly sponsored a “Battle for American Values” cruise, too. That one was canceled for lack of interest.

Tonight’s other highlights

¢ Jeff Probst hosts “Survivor Panama: Exile Island” (8 p.m., CBS).

¢ New Orleans reconstruction on “Extreme Makeover: Home Edition” (7 p.m., ABC).

¢ Things change utterly for a college student (Lacey Chabert, “Party of Five”) when she gains custody of her half-sister in the 2006 drama “Hello Sister, Goodbye Life” (7 p.m., Family).

¢ A psychic foresees his own demise on “CSI” (8 p.m., CBS).

¢ On two episodes of “My Name is Earl” (NBC), a birthday party wrong needs righting (7:30 p.m.), Earl’s ex (Juliette Lewis) has a score to settle with Joy (8 p.m.).

¢ The college application process comes full circle on “The O.C.” (8 p.m., Fox)

¢ California dreams converge on “American Inventor” (8 p.m., ABC).

¢ Jeff flirts with the new sub on “Teachers” (8:30 p.m., NBC).

¢ A father who lost a teen daughter vanishes after falling on hard times on “Without a Trace” (9 p.m., CBS).

¢ A patient wakes up after a nine-year coma on “ER” (9 p.m., NBC).