To Western moviegoers, “Czechoslovakian films” really means “Czech films.” While directors such as Milos Forman and Jiri Menzel developed international reputations, movies scripted in Slovak were seldom exported. Martin Holly managed to bridge the gap. He started his career as an assistant to Czech director Ladislav Helge and made his first Slovak film, Raven Road, in 1962. This weekend’s quick overview of the director’s work offers five films that stretch from the Prague Spring to the collapse of the Warsaw Pact, most of which emphasize not the possibility of freedom but the absurdity of the various totalitarianisms that have ruled Eastern Europe. At 1 p.m. today and 4 p.m. Sunday at the National Gallery of Art, 4th and Constitution Avenue NW. Free. (Mark Jenkins)