SCIFI.COM - Farscape

When Moya and I detected a wormhole that apparently led to Crichton's home planet "Earth," he insisted on flying there in his Farscape Module despite the cautions of the rest of us. He later discovered that the "Earth" he was visiting was an elaborate construct by a nearly extinct group of aliens called the Ancients. Needing a new home, these aliens thought Earth might be suitable. However, through their testing of Crichton, they concluded that humankind wasn't yet ready for an alien visitation.

The Ancients, perhaps as partial atonement for playing such an elaborate ruse upon Crichton, buried information about wormhole technology so deeply within Crichton's mind that he can't access it consciously. Apparently, they reasoned that if Crichton wasn't intelligent enough to discover it himself, he wasn't intelligent enough to handle the knowledge wisely. What they gave him would serve as a guide... nothing more. Crichton finds this both encouraging and frustrating; he desperately wants to find the real Earth, and realizes only too well that creating another wormhole may be his only chance of ever getting home...