Weeks was educated at Pembroke College, Oxford, where she read English (graduating with upper-second class honours). She has recently starred in The Five, created by bestselling thriller writer Harlan Coben. She is currently best known for her parts in three television series: Close Relations (1998), Ladies & Their Gentlemen (2002–2006), and Foyle's War (2002–2010, 2013, 2015). In the last, a BAFTA Award–winning detective series set in Hastings during and just after World War II, she starred opposite Michael Kitchen. In 2007, Weeks starred in The Inspector Lynley Mysteries as Tania Thomps...