Hoover vs. the Kennedys (Channel 13 Tuesday...

Hoover vs. the Kennedys (Channel 13 Tuesday at 8 p.m.) is a new two-part, four-hour TV movie on the struggle between J. Edgar Hoover and John F. Kennedy and his brother Robert, his attorney general. Jack Warden stars as Hoover, Robert Pine as JFK and Nicholas Campbell as RFK. (Concludes the following Tuesday.)

In Mayflower Madam (CBS Sunday at 9 p.m.) the elegant Candice Bergen (on the cover) is inspired casting as the upper crust Sydney Biddle Barrows, who related her experiences as the proprietor of a luxe Manhattan call-girl service in a witty and provocative memoir which served as the basis for this new TV movie co-starring Chris Sarandon and Chita Rivera.

Perry Mason: The Case of the Scandalous Scoundrel (NBC Sunday at 9 p.m.), the latest TV movie inspired by the old series, finds Raymond Burr’s Mason investigating the murder of a tabloid publisher (Robert Guillaume) involved in a series of blackmail schemes.

Poor Little Rich Girl: The Barbara Hutton Story (NBC Monday at 9 p.m., Tuesday at 8 p.m.), a two-part, five-hour drama based on C. David Heymann’s compelling best seller about the tragic, self-destructive Woolworth heiress, stars Farrah Fawcett in the title role.

That Sergio Leone-influenced Western, High Plains Drifter, airs Monday as the first of three Clint Eastwood movies occupying Channel 5’s 8 p.m. movie slot through Wednesday--the others are the lively World War II action movie, Kelly’s Heroes (Tuesday at 7:30 p.m.) and Coogan’s Bluff (Wednesday), which marked the beginning of Eastwood’s splendid collaborations with director Don Siegel.

Meanwhile, Channel 11 is offering a week of John Wayne movies at 8 p.m. Best bets: Howard Hawks’ Rio Lobo (Tuesday) and John Ford’s The Man Who Shot Liberty Valance (Friday).

Grease, that garish, amusing musical evocation of high school life in the ‘50s, shows up Monday on Channel 13 at 8 p.m. John Travolta and Olivia Newton-John are the appealing stars, but it’s Frankie Avalon, an authentic ‘50s icon, who lingers in the memory for his big spoofy number, “Beauty School Dropout.”

Buster Keaton: A Hard Act to Follow, Parts 1 & 2 (Channels 50 and 24 Wednesday at 8 p.m.; Channel 28 Friday at 10 p.m.), is the latest, eagerly awaited documentary by film historians Kevin Brownlow and David Gill, makers of “The Unknown Chaplin” and other remarkable surveys of Hollywood pioneers.

The King of Love (ABC Thursday at 9 p.m.) is a new TV movie starring Nick Mancuso as a media magnate who built a publishing empire based on sexual and political freedom. Rip Torn plays the power broker out to destroy him, and Sela Ward is the woman caught between them.

Borderline (Channel 5 Thursday at 8 p.m.), one of the first Hollywood movies to deal with the plight of the illegal aliens, stars Charles Bronson as the border patrol chief at La Mesa in a sympathetic portrait of a shrewd old pro who does his job well, though he does not always like what he has to do.

The Warriors (Channel 13 Thursday at 8 p.m.) is the controversial, ultraviolent Walter Hill movie about a gang daring to cross a rival gang’s turf. Michael Beck stars.

Death Hunt (Channel 5 Friday at 8 p.m.) tells the old story of two good, tough men who recognize themselves in each other and who are decreed by fate to become reluctant adversaries. Charles Bronson is a reclusive trapper who inadvertently triggers a slaughter that causes an intrepid veteran Mountie (Lee Marvin) to pursue him. Inspired by an incident that became Canada’s biggest manhunt, the film is unfortunately so violent that it becomes a blood bath that all but obliterates the possibility of concern for its people and its ideas.

Code of Silence (Channel 13 Friday at 8 p.m.) is one of the better Chuck Norris action pictures, a fast, racy cop thriller with too much plot but in its best moments, is reminiscent of “The French Connection” and “Dirty Harry.” “Stony Island’s” Andy Davis directed.

Agatha Christie’s ’13 at Dinner’ (CBS Saturday at 8 p.m.) is a 1985 TV movie that stars Peter Ustinov as Dame Agatha’s formidable Hercule Poirot. This time Poirot turns his deductive powers on the mysterious murder of Lord Edgware (John Barron), whose wife (Faye Dunaway) would seem to be the prime suspect. But then Dunaway has a dual role. Lee Horsley co-stars.

Will: G. Gordon Liddy (Channel 9 Saturday at 8 p.m.), a 1982 TV movie based on the best seller by the convicted Watergate break-in leader, stars Robert Conrad in an impersonation that is engaging within its narrow limits but amounts to a one-dimensional portrayal that leaves us fundamentally no better informed than we were when we began its two hours. (That the film was cut from three hours may have something to do with its seeming lack of point of view.)