Dr Leonard H. McCoy

Leonard H. McCoy  was a Starfleet medical officer in the 23rd and 24th centuries. He is best known for his long service aboard the USS Enterprise NCC 1701 and its successor the Enterprise-A. He was present during a number of pivotal moments in history, including the V'Ger Incident, the Whale Probe Incursion and the Klingon peace process.

The Devidian Incident
In 2265, McCoy was deployed to Drozana Station to help cure a strange condition affecting the station's crew. The outbreak was revealed to be the result of Devidian interference. During the crisis he was assisted by a bearded male officer who helped him develop a cure for the outbreak.