She doesn’t talk about politics so much these days, and she has recently consented to appear in such cinematic throwaways as Mission: Impossible, but Vanessa Redgrave still has a reputation as a fire-breather. Lately, though, the actress (and member of the Revolutionary Workers Party) has been telling interviewers that she identifies strongly with Clarissa Dalloway, the unadventurous society hostess at the center of Virginia Woolf’s Mrs. Dalloway. Redgrave has the title role in Marleen (Antonia’s Line) Gorris’ screen adaptation of Woolf’s stream-of-consciousness novel; tonight, she’ll introduce the local premiere of the well-meaning, if inevitably somewhat ungainly, film. At 7 p.m. at the Museum of Natural History’s Baird Auditorium, 10th & Constitution Ave. NW. $30. (202) 357-3030. (Mark Jenkins)