Farscape S01 E12 The Flax

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

While on a transport pod piloting lesson with Aeryn, Crichton gets caught in an energy field which is invisible to their sensors. Back on Moya, a strange guest docks and comes aboard to warn the crew about The Flax, an invisible energy net created to catch ships.