This week at the movies, we've got a brilliant detective (Sherlock Holmes: A Game of Shadows, starring Robert Downey Jr. and Jude Law), secret agents (Mission: Impossible Ghost Protocol, starring Tom Cruise and Simon Pegg), singing rodents (Alvin and the Chipmunks: Chipwrecked, starring Jason Lee and David Cross), and a prodigal daughter (Young Adult, starring Charlize Theron and Patton Oswalt).