A discussion of the text or interpretation of passages from six plays by Euripides edited by the author for Oxford Classical Texts: Supplices, Electra, Heracles, Troades, Iphigenia in Tauris, Ion. In addition, if James Diggle has already discussed a passage from these plays in a published article, he has incorporated a reference to that discussion at the appropriate place, often adding new material. But the book is designed not only as a contribution to the amendment and interpretation of particular passages in these plays. Many of the notes are used as a basis for pursuing topics (whether linguistic or metrical) which are of general interest, and as a result the book will be of value to all future commentators on Greek tragedy.