THE NATIONAL GALLERY of Art's "Cinema of the Avant Garde" series continues, Saturday at 2 and Sunday at 6. This weekend: Man Ray's Le Retour a` la Raison (1923), Emak-Bakia (1927) and L'Etoile de Mer (1928). Then, Maya Deren's Meshes of the Afternoon (1943; codirected with Alexander Hammid), Ritual in Transfigured Time (1946) and At Land (1944). Following that will be Joseph Cornell's Rose Hobart (1939), Gnir Rednow and Cotillion, Midnight Party and Children's Party (1940s). The series, as always, is free.

Deren's complete works will be shown at the American Film Institute Wednesday, February 3. The additional films are A Study for Choreography of the Camera (1945), Meditation on Violence (1948) and The Very Eye of Night (1959).On January 20, 1942, 14 Nazi officials met in Berlin to discuss the "final solution" of the Jews. Heinz Schirk's The Wannsee Conference (1986) is a reenactment (based on the minutes of the meeting) of what happened at that meeting. The AFI will screen "Wannsee" Wednesday at 6:30. Cosponsored by the District of Columbia Jewish Community Center, film producer Aviva Kempner will lead a discussion after the screening. Kempner also made the Holocaust documentary Partisans of Vilna. Also Wednesday, as part of the AFI's "Marcello Mastroianni" series, John (Hope and Glory) Boorman's 1969 Leo The Last will be shown, at 9. Mastroianni plays an aristocrat living in London who joins forces with members of a black slum. This film is rarely shown. Call 785-4600. Tickets are $4.50 ($3.50 AFI members).

"Boogie, Be-bop and the Blues," a series sponsored by the Black Film Institute and the District of Columbia Public Library, shows black music performances on film. Tuesday at the University of the District of Columbia's Van Ness Campus (Building 41, room AO3), it's Jazz on Film (1987), a compilation of jazz performances by Joe Turner, Fats Waller, Dinah Washington, Sarah Vaughan and others. "Jazz" is compiled by archivist Michael Chertok. Thursday, at the Martin Luther King Memorial Library (Room A5), Juju Music (1987) by Jacques Holender will be shown, which includes footage of musician King Sonny Ade. "Juju" is shown with Dance of the Bella (1984), Jim Roselini's 11-minute portrait of the dancing Bella people of West Africa, and Song of the Badius (1985), Gei Zantzinter's 30-minute film of Kriolu music from the Cape Verde islands. On January 26 at UDC, two films by Burrill Crohn will be shown: The Coltrane Legacy, a compilation documentary on John Coltrane, with Trumpet Kings (both films, 1985), a history of the instrument, narrated by trumpet virtuoso Wynton Marsalis. All shows are free and start at 6. Call 727-2396 or 727-1271.

Thursday at 8, the Smithsonian Resident Associates will show Gene Feldman's 1986 documentary, Marilyn Monroe -- Beyond the Legend, which features interviews with Robert Mitchum, Celeste Holm, Shelley Winters and others. It will be introduced by Monroe's former publicist John Springer. Admission is $6.50 ($5 members). Call 357-3030.

At the National Air and Space Museum's Samuel P. Langley Theater, Fridays at 7:30, is a (free) science fiction series. Friday, it's Invaders from Mars (1986), followed by The Blob (1958) on January 22, Invasion of the Body Snatchers (1978) on January 29, Man from Planet X (1950) on February 5, Monolith Monsters (1957) on February 12, Star Man (1984) on February 19, and E.T., The Extraterrestrial (1982). Call 357-2700.

Locals John Heyn and Jeff Krulik took video cameras to the Capital Centre before a Judas Priest concert and talked to the fans. Their 15-minute documentary on youth -- many of them beered, drugged and primed up for heavy-metal music -- is an alarming thing to watch. In a postcard to John Heyn, Baltimore filmmaker John ("Polyester") Waters called this short film "Great -- what monsters! Those ladies that want to censor records would have a heart attack . . . Thanks for letting me see it -- it gave me the creeps." Heavy Metal Parking Lot shows at the AFI, Tuesday at 8:45 and Thursday at 6:30, which precedes Taylor Hackford's documentary about Chuck Berry, Hail! Hail! Rock 'n' Roll.