Written by
John Byrne (writer and artist), Lovern Kindzierski (colors), Neil Uyetake (letters)
Printed in Leonard McCoy, Frontier Doctor #4, July 2010.
"Aboard the Yorktown, McCoy says goodbye to his friends, Theela and Duncan, who are joining a new research team. Then he says goodbye to new friends, Gary Seven and Roberta Lincoln. Afterwards, Dr. Christine Chapel asks him for help diagnosing an ailment that has caused the death of several crewmembers recently returned from Sigma Thernia 38. McCoy's knowledge of DNA and evolution lead him to a startling discovery."