Season 4, Episode 11:
While studying a wormhole in EVA, Crichton gets sucked down it and deposited in the private dimension of a powerful being he nicknames "Einstein". It's revealed that Einstein's people are of the same race as the Ancients, who were "substantially modified" to exist in Crichton's realm in order to monitor and "influence" the state of wormhole technology. After contact was lost with the Ancients, Einstein was tasked with investigating the current state of the realm's wormhole knowledge: finding a a Pathfinder beacon he dragged the beacon-bearing ship down a wormhole, only to discover that the ship he'd retrieved was actually Moya. After questioning the crew at length, he learned about Crichton and his fascination with wormholes, and has spent the last year tracking him down.
During this encounter, Crichton gets a crash-course in wormhole physics, and discovers that wormholes connect not only different points of space, but different points in time, allowing for someone traversing wormholes to travel backwards and forwards in time and potentially cause paradoxes. Crichton also witnesses the phenomenon of "unrealized realities" — universe where events occur radically different as a result of meddling with time and space via wormholes. Einstein sends him to several of these unrealized realities, including one where the identities of Moya's crew are hopelessly jumbled from one character to the next note ; another where Crichton is a Peacekeeper officer interrogating Sikozu, a Scarran spy; and one where the Scarrans conquered Earth many generations ago and interbred with the human population, resulting in versions of Crichton and his father note that are quite clearly Scarran hybrids.
As he talks with Crichton, Einstein becomes convinced that Crichton can be trusted with his wormhole knowledge, and gives him the Ancients' old mission of preventing hostile forces from gaining wormhole technology- for the moment anyway. Finally, he imparts some knowledge that allows Crichton to traverse a wormhole in only his EVA suit. However, when he arrives on the other side, he's not back at Moya — he's in orbit around the Earth...
Tropes present in this episode include:
- Armor-Piercing Question: "Are you afraid of this knowledge?"
- Arson, Murder, and Jaywalking: One sequence features a bunch of characters denouncing Crichton. After such accusations as failure or blasphemous, it concludes with Caroline calling him bad in bed.
- Bad "Bad Acting": Crichton while revisiting "the first day.""Why don't we move this along? 'WHAT IS - THE MATTER - WITH YOU PEOPLE?!'"
- Explaining how he abducted Moya last season, Einstein says he originally expected to encounter a Pathfinder vessel—meaning he got to Moya because of the beacon Neeyala implanted.
- Worried over the temporal damage he could cause by arriving at a point before he left, Crichton is told that "events that match close enough to course have a way of restructuring themselves." Crichton then remembers that Harvey told him the same thing over a year ago.
- The Chosen One: Einstein tries to convince Crichton of this, and seems pleased when Crichton rejects it.
- Continuity Nod: The first reality Crichton visits is a recreation of his arrival on Moya.
- Cursed with Awesome: Einstein concludes that Crichton himself is benevolent, but that his wormhole knowledge makes him a target of aggressive species.
- Didn't See That Coming: "Whoops."
- Exact Words: Crichton focuses explicitly on going home. He thinks he means back to Moya, but he arrives in orbit of Earth, his original home.
- Flanderization: The final unrealized reality purposefully amps up established traits: Chiana's promiscuity and willingness to give up, D'Argo's anger and barking orders, Stark's craziness, Noranti's "unique" ways of solving problems, and Jool's panicking under pressure. Rygel is also a Dirty Coward selling the crew out, but we've actually seen him go that far before.
- Foreshadowing: A montage about the danger Crichton could cause features brief snippets from "Kansas" and "Terra Firma".
- One unrealized reality features Sikozu as a Scarran spy.
- Einstein also states that he will remove the wormhole knowledge from Crichton "one day."
- Sikozu!Stark name-drops Katratzi, which proves very important for the last third of the season.
- The Reveal: This episode finally explains what happened to Moya at the end of "Dog With Two Bones".
- The Ancients are also revealed to have originally come from the same realm as Einstein to "catalog and report" about wormhole technology. Their traveling to a new world caused their brethren to lose contact with them, prompting Einstein to take direct action.
- Stock Footage: A number of clips from past episodes are re-used, such as for Einstein reading Crichton's mind.
- To Be Continued: Crichton is dangling in orbit of Earth.
- Took a Level in Jerkass: Pilot in the final unrealized reality."It gets worse, morons!"
- Unrealized Reality Episode: Crichton travels to several different such realities. The regular characters only appear in the teaser, so their actors spend the rest of the time playing different versions.