Anna Karenina (1935)
starring Greta Garbo, Fredric March, Freddie Bartholomew, Maureen O'Sullivan, May Robson, Basil Rathbone, Reginald Owen
Garbo is Anna Karenina, married to a stuffy husband (Rathbone) and devoted to her young son (Bartholemew). Everything in her rather orthodox life goes askew when she meets the Army officer Count Vronsky (March) and they fall in love. She makes a public spectacle of her adoration of the sexy, dashing Vronsky, and when her affair becomes obvious to her husband, it imperils his honor, his career, and the future of their son, so he throws her out to wander the world. Vronsky is in hot water, too. Warned to cut out the adultery business, he resigns and joins Garbo in Venice for a lengthy and thoroughly disrespectable honeymoon. Anna doesn't mind leaving her husband, but the guilt over her willing separation from her son gnaws at her. She begins to snap at her lover. She accuses him of wanting to get back into the Guards and fight in the Turkish-Serbian War, which in fact he DOES want, but not if it means leaving her. In the end, sufficiently provoked, he joins his friends in the regiment and takes off for the war, intending to return. This leaves Anna alone in Petersberg. She broods, becomes depressed, and throws herself under a train.
Another b&w version is this, which also is shown regularly and is very popular, perhaps because of the presence of Vivien Leigh (best-known as Scarlett O'Hara in "Gone with the Wind"):
Anna Karenina (1948)
starring Vivien Leigh, Ralph Richardson, Kieron Moore, Sally Ann Howes, Niall MacGinnis, Michael Gough, Martita Hunt
There are a number of versions of Leo Tolstoy's novel, including an earlier Silent version titled "Love" and starring Greta Garbo. Others are:
Anna Karenina (2000 TV miniseries) ~ starring Helen McCrory
Anna Karenina (1997) ~ starring Sophie Marceau
Anna Karenina (1985 TV movie) ~ starring Jacqueline Bisset
Anna Karenina (1977 TV miniseries) ~ starring Nicola Pagett
Depending on the age of the film, it would have to be either the Garbo or the Leigh version.