Ryan finds Tad to ask about the condition of his sister Erin. Brooke witnesses Adam getting a stroke. After being attacked by Zack with words, Erica fires back. Ethan and Maria begin to make love, with Maria thinking that Ethan is Zack. Kendall and JR get it on and begin to make their own love until Kendall feels she is making another bad mistake. Brooke calls 9-1-1, but the phone is hung up by Adam. Meanwhile, Tad reveals Erin's recent history and tells of how Erin came to the East Coast on a business trip, then disappeared. Zack walks in to an Ethan with his shirt open and a distressed, lightly clothed Maria. In anger, Zack throws Ethan out of his own hotel suite. Jack and Erica get into another fight, when Erica finally realizes why Jack is angry (Hint: Ryan and Greenlee) and so eager to help Maria. Just for Brooke, Adam agrees to go with her to the ER. Mary starts a cat fight with Erica, but it ends when Palmer drags her away. After finding out from Simone that Kendall is with JR, (thetvdb.com)