Which episode has Kirk and Spock meet Abraham Lincoln on Excalbia?

“Which episode has Kirk and Spock meet Abraham Lincoln on Excalbia?” The answer is “The Savage Curtain.” It was the twenty-second episode of the third season and first aired on March 7, 1969.

The Enterprise reaches the volcanic planet Excalbia during a geological survey. An apparent Abraham Lincoln materializes and approaches the ship, and Kirk—taking the encounter seriously—extends presidential honors before joining Lincoln on the planet’s surface.

There, Kirk and Spock meet Surak, the ancient founder of Vulcan civilization. The Excalbians force the pair, Lincoln, and Surak into a philosophical experiment pitting representatives of good against figures such as Kahless, Genghis Khan, Colonel Phillip Green, and Zora. The test asks whether good and evil are fundamentally different.

Lincoln is not necessarily the historical man resurrected. The episode suggests that the Excalbians created forms based on Kirk and Spock’s knowledge and expectations. “The Omega Glory” is an understandable confusion because it also invokes Earth history, but it does not feature Lincoln or Excalbia.