Casey and Ricardo decide to find out what is in the back room in the warehouse. They come in the place, but can't find anything, because Derek removed all the traces. Tyus notices that Ben is strangely dehydrated, and that he never saw a person dehydrate like that in just a few hours. Olivia tells Gregory that she is determined to find out what actually happened to her baby. Sara tells Joan about the picture of Ben and Derek together, and Joan suggests that Sara doesn't say anything to Meg, because they think that Ben's brother is dead. Derek decides to replace Ben in the hospital. He sets a fire in the warehouse. (thetvdb.com)