“Travelers” is episode five of season four of Stargate: Atlantis.
Colonel Sheppard is on his way back from delivering supplies to a scientific outpost when his Puddlejumper is attacked by a strange ship. His jumper is disabled and he is abducted by a culture who live in ships in space.
The people want him to help them fix a Lantean battleship that they have found, because their ships are wearing out and they need more room.
Sheppard’s attempt to escape from them draws a Wraith ship down onto them.
The team has so far not done too well at salvaging Lantean ships, with them winding up quickly destroyed.