Tony is first seen at the beginning of the episode, taping a picture of Dr. Lee to a missile target after their relationship breaks up. Unbeknownst to him, Dr. Lee is starting a relationship with the man helping him out - Glenn.
When Dr. Lee gets sick, her boyfriend Ceaser deflects suspicion about himself by pointing the finger at Tony, saying he took the breakup badly. As a result, the team does an environmental scan of his home looking for toxins, but instead find he is an avid gun collector and hunter. They abandon their search when the other half of the team calls them to tell them they found alcohol at Dr. Lee's house.