Walter Hill’s Southern Comfort (Channel 9 Sunday...

Walter Hill’s Southern Comfort (Channel 9 Sunday at 6 p.m.), a tense, involving nightmare of a movie, finds nine National Guardsmen (including Keith Carradine and Powers Boothe) lost in a Louisiana bayou where they have managed to enrage Cajun residents. A taut, dankly beautiful work, it’s one of Hill’s best films.

Another Hill winner, 48 HRS. (NBC Sunday at 9 p.m.) is the rambunctious 1982 cops-and-crooks comedy starring Nick Nolte as a seedy, seasoned law enforcement veteran and Eddie Murphy, in a sensational film debut, as a sassy, outrageous convict on a two-day furlough to help Nolte nail one of Murphy’s former cohorts. Hilarious, but also pretty violent.

On a more serious note are two new TV movies also airing Sunday at 9 p.m.. In Outrage (on CBS) Robert Preston plays a father who takes the law in his own hands after the rapist-killer of his daughter goes free on a legal technicality. Beau Bridges is Preston’s attorney. ABC’s Acceptable Risks (illustrated on the cover), which tells of the consequences of a leak at a chemical plant in a typical American city, stars Brian Dennehy as the plant manager and Cicely Tyson as a city official.

Hal Ashby’s Coming Home (Channel 13 Monday at 8 p.m.) remains one of the best films on Vietnam, with Jon Voight and Jane Fonda both collecting Oscars for their portrayals of a disillusioned, embittered paraplegic and the wife of a gung-ho Marine officer (Bruce Dern, also outstanding) who fall in love.

The Children of Times Square (ABC Monday at 9 p.m.), a new TV movie, tells of a 14-year-old runaway (Brandon Douglas) who becomes involved in a gang of underage drug dealers run by Howard E. Rollins.

Diary of a Perfect Murder (NBC Monday at 9 p.m.), a new TV movie, stars Andy Griffith and Lori Lethin as a father-daughter legal team who defend a famous TV journalist accused of murdering his ex-wife.

Vintage but still potent: James Caan’s Hide in Plain Sight (Channel 5 Tuesday at 8 p.m.) in which Caan, who also directed, plays a father struggling to find his children after his ex-wife marries a small-time hood who becomes a part of the witness relocation program when he testifies against organized crime; and Bob Fosse’s highly autobiographical, Felliniesque All That Jazz (Channel 13 at 8 p.m. Tuesday and Saturday) with Roy Scheider as Fosse’s hard-driving, chain-smoking alter ego.

The new TV movie A Deadly Business (CBS Tuesday at 9 p.m.) is based on the true story of Harold Kaufman (Alan Arkin), an ex-con whose undercover work for the FBI exposed corruption and the involvement of organized crime in the handling of lethal toxic wastes.

The Dogs of War (Channel 5 Thursday at 8 p.m.) is a contemporary adventure about a mercenary mission in a banana republic that’s so trite you wonder why it was ever made--even if was based on a novel by “The Day of the Jackal’s” Frederick Forsyth. It’s an unduly solemn film that takes itself very seriously yet in the end, after much carnage, offers the numbed viewer nothing more profound than the observation that being a mercenary is a rotten business. Christopher Walken may be a fine actor, but he lacks that starry magnetism essential to making us care about his laconic, steely mercenary.

Martha Coolidge’s Valley Girl (Channel 11 Saturday at 9 p.m.) is a fast, sweet, unpretentious, funny and even touching Romeo and Juliet story starring Deborah Freeman in the title role and Nicolas Cage (in a knockout screen debut) as a Hollywood High kid who pursues her. Very sharp social observation here.

The new TV movie Classified Love (CBS Saturday at 9 p.m.) stars Michael McKean, Stephanie Faracy, Dinah Manoff and Franc Luz in a romantic comedy about young people seeking relationships via the personals.