A Dramen who survived the plague on Dramia II and remembers Dr McCoy with gratitude, and who agrees in 2270 to testify in the doctor's defence.
Kol-tai appears in the animated episode Albatross. Nineteen years after McCoy led an inoculation programme on Dramia II, the Dramens arrest him on a charge of having caused the plague that followed and killed most of the colonists.
Spock goes to Dramia II to look for evidence, and Kirk follows. Among the few bitter survivors they find Kol-tai, who was treated by McCoy and is sure he did no harm. He comes aboard the Enterprise to speak for him.
On the way the ship passes through an aurora and Kol-tai falls ill with the plague, as does the whole human crew. With McCoy released to work on it, the cause is traced to the aurora and an antidote found, which clears his name.