With Maddie and Tom away on vacation, things go awry for Sonic upon the unexpected return of the sinister Dr. Robotnik and his new ally, Knuckles. As the duo seeks out a powerful crystal capable of destroying the world, it is up to Sonic and Tails to thwart Dr. Robotnik's schemes. Rated PG, 2 hrs. 2 mins. Starring James Marsden, Ben Schwartz, Jim Carrey, Tika Sumpter, Idris Elba