Tilda Swinton was so good in I Am Love, the movie I panned this week, that now I’ll plug The Deep End. This 2001 thriller stars Swinton as a Lake Tahoe mom who must cover up a crime to protect her teen son. Then ER heartthrob Goran Visnjic shows up to blackmail the family. The more the situation spirals out of control, the more gripping Swinton’s performance.