Imelda Corcoran

Coulson's mysterious etchings lead the team to several murder victims.

Desmond looks for a woman who might be the key to helping Faraday stop the island's unpredictable movements through time; Locke finds out who has been attacking the survivors.

Catherine's frustration intensifies when a lead suspect in Grace's disappearance is found murdered. The team exhaust all their skills to figure out who killed the suspect, and if his death will lead them to Grace.