The Vertical Hour - TNT

David Hare's 2006 play is primarily a political argument dressed up as personal conflict. It's supremely well-acted — by Indira Varma as American Nadia (a former foreign correspondent turned Yale academic) who supported the invasion of Iraq, and Anton Lesser as Oliver, her English boyfriend's doctor father (a '60s liberal and former womaniser) who opposed it. Their introduction at his isolated home provides an excuse for a soul-searching exchange of ideas — and an unanticipated spark of attraction — but (like her relationship with his physical therapist son) the interactions don't always ring true. As they challenge each other's differing perspectives, they too often seem mere mouthpieces. But, thanks to the detailed performances and Hare's wide-ranging intellect, the debate is — just about — kept on track.
Royal Court Theatre, Sloane Sq, SW1 (020-7565 5000). Until March 1. £10-£25