Farscape - Season 3 Episode 9 -

Upon passing through an electromagnetic cluster, Crichton sees a strange being aboard Moya. It seems to attack him, causing him to black out and bleed profusely. However he cannot prove his experience actually occurred, so the rest of the crew believes he is hallucinating. He continues to have these episodes, but without the help of his friends he has little chance of discovering what is happening to him.