Complex sentence: In Season 4, Ray admits that the accident has left him paralyzed again, which causes him to show even more ire towards Archer; but in the third episode, Krieger gives him cyborg leg-implants that allow him to walk again.
Split into simpler sentences: In Season 4, Ray admits that the accident has left him paralyzed again, which has also caused him to show even more ire towards Archer. However, in the third episode of season 4, Ray gets cyborg leg implants from Krieger that allow him to walk again.