Complex sentence: In "Time Heals", Gwen infiltrate his house to steal the Grimor of Archamada, and, despite Paradox's warning, use it to time travel to the past and prevent Ben and Kevin's from hacking the Omnitrix, canceling Kevin's mutation.
Split into simpler sentences: In "Time Heals", Gwen infiltrate his house to steal the Grimor of Archamada. Despite Paradox's warning, Gwen uses it to time travel to the past and prevent Ben and Kevin's from hacking the Omnitrix, cancelling Kevin's mutation.