House runs into Wilson's office with definitive proof, he says, that Foley (and therefore House's) loss was not legitimate. He shows Wilson a picture on his phone that he took of Foley and tells Wilson to pay special attention to Foley's pupils, where House sees a case of anisocoria (one pupil is larger than the other) and somehow uses that to diagnose Foley as being tachycardic during the fight due to suffering from a heart condition. That was what caused him to pass out, not the punch. Therefore, House says, all bets should be off. Wilson just tells House to prove that Foley was too sick to fight with something more than a cell phone picture.
House tries to escape work without anyone else bothering him, but Caesar, Wendy's co-worker and boyfriend, stops him in the hall. House insists that he doesn't care about Caesar or Wendy or anything, but Caesar won't let him go until he tells House that he believes Wendy is being poisoned by her crazy ex-boyfriend, Tony. House takes Caesar's words seriously enough to tell the Cottages about it, calling Wendy a slut for dating two of her co-workers. Hadley doesn't appreciate the fact that a woman can't date two people who happen to work with her without being called a slut, as she is apparently totally cool with Wendy now. House apologizes to her, saying he only called Wendy a slut because he thought they were still judging Wendy's life choices. Foreman stands up for women and crazy ex-boyfriends everywhere, saying Wendy is not a slut and also not being poisoned, since they tested Wendy's blood and spinal fluid for every toxin they could think of and every test came back negative. Taub says that doesn't rule out the toxins that they didn't think of, noting that she does work in a bomb laboratory where she could potentially be exposed to all kinds of weird deadly stuff. Foreman says if that were the case, her co-workers would be sick, too. House decides that Wendy's case is starting to "get interesting," and will be even moreso if he adds "a little danger."