Clark Gable

Clark Gable was a 20th century American actor of extraordinary accomplishment.

Edith Keeler mentioned him to both James Kirk and Leonard McCoy during their visit to Earth, in the year 1930. Both men knew nothing of the actor, a fact Keeler considered extraordinary – and that inadvertently led to their reunion, and Keeler's death. 

In an alternate timeline, when the USS Voyager was severely damaged by the Krenim, B'Elanna Torres wrongly assumed she had seen Gable starring in the 1955 movie To Catch a Thief twice, when in fact it had been Cary Grant.