Farscape S02 E10 My Three Crichtons

"My name is John Crichton, an astronaut. I'm just looking for a way home."

A strange globe appears on Moya, sucking in Crichton and duplicating him creating two additional people. One who is a de-evolved 'cave man' and another who has increased mental ability. Note: This episode features after the "Look at the Princess" trilogy on the DVDs.