In Malachi Ward's short comic The Scout, a scout is sent to an alien world to determine whether it is suitable for colonization. But when he encounters another version of himself, he ends up exploring his own identity instead.
The premise of The Scout is simple: an explorer's information has been sent to the caves of a possibly habitable planet, but the information has been sent multiple times, meaning there are multiple versions of the explorer, with shared memories, on the planet. It takes the trope of space exploration and turns it into an exploration of something more unsettling: ourselves.
The Scout [Study Group Comics]