MONDAY

4:30 p.m. - Bus Stop, the film that catapulted Marilyn Monroe into the superstar category, based on a play by William Inge, a drama of lovesick cowboys and barmaids with hearts of gold. Channel 10.

9 p.m. - The Spirit is Willing, a rare opportunity to see the great Sid Caesar in a vehicle that warrants his presence. William Castle produced this spoof of horror films, including his own "Rosemary's Baby." Channel 5.

TUESDAY

4:30 p.m. - The Beast from 20,000 Fathoms, for the monster lovers. An aquatic version of the Tyrannosaurus Rex makes lunch of everything from a diving bell to one of New York's finest, but the radioactive isotope finally gives him terminal indigestion. One of the more entertaining beasts of the fifties. Channel 10.

8 p.m. - The Gloucester Men, a look at our rustic neighbors to the north, with special attention to their traditions, legends, and culture of the long, high ships. Channel 2.

8:30 p.m. - Evening at Pops, Arthur Fiedler and the gang are joined by pianist-singer Bobby Short, whose love of Cole Porter, et al. is well-known. Channel 2.

WEDNESDAY

11 p.m. - Repulsion, the finest horror-thriller ever made. Roman Polanski directed the lovely and crazed Catherine Deneuve in this gruesome tale of obsession, insanity, and brutality. Although the action will probably be cut badly for television, watch it in a dark room by yourself, and maybe you can get some of the spine chills. A brilliant film visually and dramatically, a must. Channel 38.

THURSDAY

1:05 a.m. - Go West, Young Man. Mae West, that is. She is a famous actress gracing a small cowtown with a visit, and Randolph Scott is her straight man. Channel 4.

FRIDAY

9 p.m. - The Cincinnati Kid, Norman Jewison's favorite of his own films, and quite likely his finest. Steve McQueen is the kid who forsakes love and security to challenge Edward G. Robinson's supremacy at five-card stud. This film is for poker what The Hustler was for pool, and powerful performances by McQueen, Robinson, Karl Malden, Joan Blondell, and Tuesday Weld overcome some weaknesses in the script. Despite this glittering cast, however, the entire show is stolen by a cameo appearance by the Jack of Diamonds. Channel 7.

9 p.m. - For those who like baseball better than poker, our Sox take on their Sox in Chicago. For those who may be unfamiliar with the Bosox TV broadcasting team, stay that way. Turn off the sound and just watch the game. Dick Allen is a joy to watch anytime. Channel 4.

FOR THE HARD CORE: