Democratic Party Telethon. 18 1/2 hours with such as Joan Rivers, Mike Nichols, Gregory Peck. Johnny Carson, Watch and give: if they help elect McGovern, it'll be worth the time and money. SATURDAY: CHANNEL 5, 8 p.m.

Film Odyssey: Los Olvidados. A 1950 film by Luis Bunuel, at once a scathing portrayal of Mexican slum sub-culture, and a kick in the pants of liberal reformers who try to change men's hearts instead of concretely ameliorating social conditions. CHANNEL 2, FRIDAY 9:30 p.m.