Crell Moset Dr . Crell Moset was a male Cardassian exobiologist of the 24th century Cardassian Union . By 2371 , he became the chief exobiology specialist on Cardassia Prime and was the Chairman of Exobiology at the University of Culat . He was renowned even among other civilizations as the foremost exobiologist . To all outward appearances , Moset was polite and courteous with a brilliant medical mind . But , in reality , Crell Moset , was cold , calculating and ruthless ; doing whatever he wanted to get the data he needed . During the Occupation of Bajor , Dr . Moset was practicing medicine on Bajor . Without the resources to try traditional methods , Moset experimented with procedures that never would have occurred to him under ordinary circumstances . As a doctor on Bajor , Moset found the simplest tools , such as scalpel s , were the most effective because modern equipment removed a doctor from his subject . It was by these methods that he accidentally discovered the cure for the Fostossa virus epidemic , saving thousands of Bajorans ' lives and for which he won the Legate ' s Crest of Valor . What was unknown outside of Cardassia and Bajor , however , was the fact that all of Moset ' s experiments were performed on living people . Thousands of Bajorans were killed in his so - called hospital , including crewmember Ensign Tabor ' s brother and grandfather . Many of his studies included experiments such as blinding his " patients " so he could study how they adapted , or exposing them to polytrinic acid just to see how long it would take for their skin to heal . The most horrific part of Moset ' s experiments was the method used to cure the Fostossa virus epidemic , which was accomplished by infecting hundreds of people so that he could experiment with different treatments . According to Starfleet records , Moset purchased many biochemical agents , including every known strain of the Fostossa virus – a typical procedure in the development of vaccines . However , he didn ' t ask for any of the enzyme s normally required for synthesizing a vaccine . Four days after he received the virus samples , there was a minor outbreak of Fostossa in the vicinity of his hospital . Prior to that date , there had not been a single case in the entire province . In 2375 , Dr . Moset ' s data was consulted by The Doctor aboard " Voyager " in an effort to remove a cytoplasmic lifeform that was living on Lt . B ' Elanna Torres . B ' Elanna and others vehemently objected to the use of Moset ' s knowledge to treat B ' Elanna considering Moset a war criminal . The Doctor , expressing his desire to save B ' Elanna regardless of Moset ' s professional history . Considering him a genius ( but lacking knowledge of the atrocities he had committed ) , The Doctor even made a holographic simulation of Dr . Moset as " " Medical Consultant Program Beta one " " . The Doctor deleted the hologram after the creature had been removed as he was unable to reconcile Moset ' s successes with the brutal methods he resorted to in order to gain the data in the first place . ( ) Background information . Moset was played by actor David Clennon . Apocrypha . In the novel " The Battle of Betazed " , Crell Moset experiments on the Betazoid s after the Dominion conquers the planet , hoping to create telepath ic Jem ' Hadar , only for the experiment to fail when the Jem ' Hadar prove incapable of coping with the increased sensory input . Moset also appeared in the " Voyager " Relaunch " " novels , where he is rescued from Starfleet capture by a renegade Changeling who became trapped in Solid form several years ago and seeks Moset ' s help in restoring his old abilities , simultaneously experimenting on Chakotay ' s people to unlock the full potential of their Sky Spirit - enhanced DNA . At the conclusion Moset is confronted by " Voyager " s new doctor Jarem Kaz , a Trill whose previous host ' s wife was killed by Moset ' s experiments , who coldly forced Moset to realize just how horrific and evil he would be regarded as by future generations , subsequently refusing to kill him as he preferred to leave Moset forced to look at a mirror of just how ruthless he was . In the " " novel " Night of the Wolves " , Moset infected Kira Nerys ' mother Kira Meru with the Fostossa virus in 2353 on the orders of Gul Dukat , who believed that she was becoming a liability . Meru died shortly thereafter . His mirror universe counterpart appears in the novella " The Mirror - Scaled Serpent " and the short story " Bitter Fruit " contained in the anthology " Shards and Shadows " . He is described as performing experiments similar to those conducted by his primary universe counterpart on s and others species on behalf of the Klingon - Cardassian Alliance .