In television, "character assassination" is handled differently than it is in what we might scoffingly call real life. Before the actual assassination often come character denigration, character humiliation and any number of other punishments meted out by authors who've perhaps grown sick of the artificial people they created or at least have developed a burning animosity toward them.

Or they might have based certain of their artificial people on real people they know, and the hatchet jobs they perform are a way of working out hostilities against villains they've come to know along the way.

Watching "Six Feet Under," the HBO drama about an extended family whose locus is an inherited funeral home, regular viewers may be getting the feeling that executive producer Alan Ball and his writers are using their show to get even with some of the ghastly nasties who've crossed their paths. Unfortunately, this sort of thing is not a guarantee for Viewer Delight.

In fact, it may be quite off-putting, making viewers feel like outsiders and intruders, or just boring them. Ratings for "Six Feet Under" are down by a million viewers from last season and another million from the season before that, and complaints about the show appear to be increasing. Maybe things have gotten out of hand.

The problem is not limited to "Six Feet Under." One might almost say that HBO is stuck with a counterproductive case of the blues. Show after show seems fixated on the morbid, the dreadful, the depressing and the misogynistic. Horrendous clunkers like "Carnivale," which HBO is inexplicably bringing back for a second season, offer very little to reward viewers and virtually nothing to tickle them.

With "Sex and the City" gone and "The Sopranos" on another of its year-long vacations, the HBO schedule of original series is distressingly dour. Such shows as "Deadwood" (for all its raw power), "The Wire" (returning Sept. 19) and the occasional new episode of "Autopsy" (just what it sounds like, and more graphically gory than any of the "CSI" dramas on CBS) can certainly leave a viewer moaning in agony rather than jumping from the couch for joy. Usually joy has nothing to do with it. "Wire" is set on the meanest streets of a drug-infested city; on Aug. 26, in the same vein, HBO will air a special called "Back in the Hood: Gang War II." An alleged comedy series, "Da Ali G Show," involves cruel hoaxes played on unsuspecting saps, plus tasteless jokes that involve such topics as the 9/11 disaster, the Holocaust and anti-Semitism generally.

It's one thing to have an "edge" and another to let the edge slice your head off.

Of course, there are bright spots: TV's wickedest comedy, "Curb Your Enthusiasm" (also on hiatus); the newly arrived "Entourage," a semi-satirical safari along the pathways of the overprivileged in Hollywood, and more.

"Six Feet Under" continues to have its moments of smart, scintillating and audacious drama, and though its characters may be turning sour, they still sometimes take gratifying turns down one of life's unlikely detours.

On last Sunday night's show, one of the most likable characters, a gay ex-cop named Keith who's taken a job as a security guard for depraved rock stars, was propositioned by a "straight" male colleague while both were working an event. "What's the matter, don't you think I'm sexy?" the inebriated partner taunted, boasting of a Brobdingnagian endowment.

Here was the kind of vignette from a gray area of the gay experience that isn't commonly depicted in TV or movie fiction. It may even have been a first, and it was full of bristling tension. The would-be seducer wore a conspicuous wedding ring. Keith, who's mostly faithful to his partner back home, said, "I don't treat my men the way you treat your women."

The writers who contribute scripts to "Six Feet Under" roam the human psyche in search of subtleties that a cast of credibly quixotic actors has shown admirable skill at communicating. In its first season, "Six Feet Under" daringly broke new ground (ahem) and teetered teasingly on the brink of surrealism. Though the technique is now fairly common, "Six Feet Under" was one of the first shows to have dead characters pop back to life for visits among the living. Being dead apparently can give a person unique perspective on what it means to be alive and the myriad mistakes people can and do make.

Unfortunately, once we get past the virtuous security guard (played with frequently tested dignity by the quietly compelling Mathew St. Patrick), the characters of "Six Feet Under" are an increasingly whiny lot, some of them annoying and others infuriating. Among the prime offenders is Frances Conroy, who plays Ruth, the nominal matriarch of the Fisher family. The patriarch (Richard Jenkins as Nathaniel) was the first to expire as the show began (each episode opens with a death, usually of someone not related to the Fishers except as a potential customer) and gave the impression of being a good egg but hasn't been seen much lately. The screamingly repressed priss he married may have driven him to an early grave (no, not quite literally, as Mrs. Fisher seldom takes the wheel of a hearse) and may have even discouraged him even from making his genial spectral die-bys.

She has married a fantastically annoying pedant and fussbudget played by gaunt James Cromwell (still best remembered, by some of us anyway, as the friendly farmer in "Babe"), a professor of geology who destroyed six previous marriages with his persnickety pickiness and a perverse desire to be alone and implicitly unmarried whenever the mood strikes him. It struck him last week. He left the house with no prior warning, saying, "I'll be back in a couple of hours."

She: "Where are you going?"

He: "You are smothering me!"

Heaven help us, we have all -- or almost all -- known that kind of idiot.

In one of the most controversial and, some loyal viewers think, off-putting episodes in the history of the program, son David (Michael C. Hall), who is among those trying to keep the funeral business alive, recently underwent a prolonged and revoltingly graphic carjacking, tormented and tortured by his assailant for what seemed like the bulk of the one-hour episode. The producers got the proverbial water cooler wish: Everybody was talking about it the next morning. But some were saying, "I'll never watch that show again." Although David is homosexual (Keith has shown superhuman patience by staying with David except for one or two separations), this assault turned out not to be a gay-bashing incident, though it clearly had darkly erotic overtones.

Most of the overtones on "Six Feet Under" are dark if not erotic.

What's followed that episode is the week-by-week disintegration of whatever mental stability David had left. He appears to be suffering from post-traumatic stress disorder, plagued with nightmarish fantasies and a penchant for violence. Last week's episode ended with David drowning in his own anxiety. The question now is whether he will come apart in umpteen different directions, the way Daffy Duck used to do when apoplectic over some catastrophe.

Perhaps Ball should be congratulated for having made such a daring move as the carjacking episode, or maybe it was a stunt born of desperation, a way to inject life into characters who, appropriately or not, were becoming deathly dull. By the same token, or maybe a different token, HBO might be considered brave for offering its paying customers so much that is dark, realistic, relevant.

As it happens, the word has gone out that HBO is in the market for new original comedies that take advantage of the network's greater latitude in language and subject matter.

It would be nice, in this case at least, if executives look on the bright side and perhaps even reject a few ideas that seem too doom-and-gloomy.

During the Great Depression, audiences saw Fred and Ginger dance and Busby Berkeley's gorgeous chorines splash and romp about. You can't go home again, but there has to be an alternative to the bitter medicine that HBO is charging us a considerable fee to swallow.

Will gloom doom HBO shows? Top, Freddy Rodriguez, Peter Krause, Michael C. Hall of "Six Feet Under"; above, Idris Elba and Wood Harris in "The Wire"; left, Sacha Baron Cohen as Ali G; right, Ian McShane in "Deadwood"; below, Michael Imperioli, James Gandolfini, Tony Sirico and Steven Van Zandt of "The Sopranos." Mathew St. Patrick, left (here with Freddy Rodriguez and Justina Machado), has become one of the more likable characters on "Six Feet Under."Executive producer Alan Ball needs to inject new life into "Six Feet Under."