1945. UK. Dir: David Lean. With Celia Johnson, Trevor Howard. 86 min.

When Laura and Alec, both married, meet by chance at a train station, they embark on a friendship that threatens to upset their comfortable domestic lives. Wafting fog, dreamy voice-over, and a Rachmaninoff score make this abbreviated tryst a perfect prelude to Valentine’s Day, whether you’re a hopeless romantic or firmly in the “love is doomed” camp.

Tonight / 8 p.m. / Goldsmith Family Cinema / Free