THURSDAY: Splendors of Versailles. Filmed in the palace of Louis XIV this musical special features costumed singers, dancers and instrumentalists. CH. 2, 9 p.m. Color. 60 min.

SATURDAY: Forbidden Games. Rene Clement's Oscar-winning 1952 anti-war film. CH. 5. 2 a.m. B.W. 1 hr. 45 min.

Playhouse New York. John Gielgud and Ralph Richardson in the highly acclaimed original cast version of the British hit "Home." CH. 2 8:30 p.m. Color. 90 min.

Giant. Minor bits by James Dean and Dennis Hopper illuminate this baggy epic from the Edna Ferber bestseller. CH.4. Two parts. Sat. 9 p.m., Mon. 9 p.m. Color. 198 min.

SUNDAY: Citizen Kane. Classic Welles. CH. 56. 8 p.m. B.W. 2 hrs.

The Trouble with People. Neil Simon presents a five-sketch special with an all-star cast including James Coco and George C. Scott. CH. 4, 9 p.m. Color. 60 min.

True Grit. John Wayne finally got his Oscar in this one, as much from sympathy as for his performance as Rooster Cogbura. First time on TV. CH. 5. 9 p.m. Color. 2 hrs. 30 min.

MONDAY: Bogart. Bogey fans get a break. Cambridge's own Channel 56 begins a week-long Bogart festival tonight with To Have and have Not. Other features include Treasure of the Sierra Madre, Casablanca, The Maltese Falcon, and Key Large, CH. 56, Mon-Fri. 8 p.m. B-W.

To Be or Not to Be. Ernst Lubitsch's 1942 satire on Nazi politics featured Carole Lombard in her last role. CH. 38, 11 p.m. B-W, 90 min.

TUESDAY: America Alistair Cooke Initiates a 13-part series-a very personal and eclectic survey of U.S. history-with an examination of the age of discovery. Using techniques developed in the BBC series "Civilization", Cooke blends paintings and prints with filmed recreations to explore the American past. CH. 4, 10 p.m. Color. 60 min. (Will run once a month)

WEDNESDAY: Jacques Cousteau Cousteau continues his intriguing series of undersea specials with a look at The Smile of the Walrus," CH. 5, 8 p.m. Color, 60 min.