After Torres is stricken by a bizarre, injured alien that latches itself onto her body, The Doctor creates another holographic physician, a Cardassian exobiologist named Dr. Crell Moset, to save her life. But Torres refuses treatment when it's learned that the physician engaged in unethical wartime medical practices.

David Clennon (Dr. Crell Moset)
Jad Mager (Ensign Tabor)
Frank Welker (Alien Voice)

• Dr. Moset cured the Fostosa Virus during the Cardassian occupation of Bajor. He infected thousands of Bajorans with the disease and then used them as subjects to gather information on the effects of the disease. (During his justification speech, Moset compares experimenting on Bajorans to experimenting on lower lifeforms and animals.)
  
• Tabor's brother and grandfather were killed by Dr. Moset during the Cardassian occupation of Bajor.
  
• At the end of the episode, the Doctor deletes the medical consultant program and all of its related files.
  
• The Doctor begins a new hobby: holo-imaging. He gives the crew a slide-show presentation.