Sam sees a cow and he doesn't think anything is wrong. He just thinks that the cow is a hallucination.
The cow disappears and then Sam notices that a human being is appearing.
Sam tries to communicate with other Sam and tries to figure out where he is from.
Sam is talking to the other Sam outside the dome and this affects him because he starts to believe that other sam is trying to communicate something to him and he ends up making a plan to help other sam.
When Sam comes back inside he runs into the corridor master. The commander is mad because Sam came in two minutes before the time he was due to come in and he says he is cutting it close.
Sam was talking to Gentry about what he was doing outside. They say he wasn't looking at anything and he was having a hallucination.