Askalon V was a Class M planet. Although there was evidence that a civilization once thrived on the planet, by the late 23rd century the planet was barren and uninhabited, and only the ruins of that long-lost civilization remained. Before a detailed analysis could be conducted something had affected Ensign Demora Sulu, and she began attacking members of the landing party. Harriman was forced to fire multiple phaser shots at Sulu in order to stop her attack, and unfortunately she was dead before she managed to get medical treatment aboard the Enterprise. (TOS novel: The Captain's Daughter)