For those sick of glad tidings and goodwill during this holiday season, SIFF is offering nothing but gloom, famine, and global destruction in its Apocalypse Film Festival. Of special note is Children of Men, released so late and with so little studio support in 2006 that it was criminally overlooked by Oscar voters. Alfonso Cuarón’s adaptation of the P.D. James novel envisions an infertile, environmentally blighted planet, with Clive Owen as possibly the last decent man on Earth. Britain has become a near police state, and selfishness reigns supreme. It’s Ayn Rand meets Gitmo, with some of the most astonishing long-take action scenes ever put to film. (R) BRIAN MILLER

Wed., Dec. 19, 9 p.m.; Thu., Dec. 20, 2012