Kol (spy)

Kol was a Klingon male who worked as a spy for the Empire. Kol infiltrated the Federation and posed as Elliot Tindall, a scientist, going so far as to marry a Human, Luisa.

In 2275, the medication that allowed Kol to act like a human began failing him and he started to suffer mood swings. During this period, Kol's scientific work led to him working aboard the USS Enterprise (NCC-1701). While aboard the ship, Kol tried to beam aboard the to get a new supply of medicine, but was stopped by the Enterprise's crew. He was then interrogated by Spock and revealed that he was indeed a Klingon spy, confirming Spock's suspicions.