Ben 10: Alien Force · S03E15
Time Heals
2010-01-22 · 23 min · 3.9 (5) · TMDB
Despite being warned by Paradox, Gwen travels back in time to prevent the accident that turned Kevin into a monster from ever happening. Gwen returns to the present only to find that her time traveling caused a series of events that led to Hex ruling the world.