After settling in Green Hills, Sonic is eager to prove he has what it takes to be a true hero. His test comes when Dr. Robotnik returns with a new partner, Knuckles, in search of a mystical emerald that has the power to destroy civilizations. Sonic teams up with his sidekick, Tails, and together they embark on a globe-trotting journey to find the emerald before it falls into the wrong hands. Redeem at ParamountDigitalCopy.com. Choose VUDU 4k or iTunes 4K from that menu. Keep in mind that it will NOT transfer to Movies Anywhere. (RATED PG)  Director: Jeff Fowler Writers: Patrick Casey, Josh Miller Cast: Ben Schwartz, James Marsden, Jim Carrey, Tika Sumpter, Natasha Rothwell, Adam Pally, Neal McDonough, Lee Majdoub