Ultimately, Source Code makes good on its Hitchcockian opening sequence -- it may pale in comparison to the master, but it's a fun, puzzle-filled ride, with excellent pacing and a mounting uneasiness that recalls the best episodes of The Twilight Zone.
Source Code is a mind-bending minor classic of its type, a sort of Groundhog Day with terrorism and fewer weather reports. It's as if The Matrix hopped aboard a rapid-transit line and got derailed into the American military bureaucracy.
Jones proves with Source Code that he understands how to pace a traditional thriller, and Gyllenhaal's display of comedic chops, confident bravado and tender sympathies prove that the 30-year-old actor has arrived at leading-man status.
Uma ficção científica exemplar: apresenta um conceito interessante, explora-o a fundo e, de quebra, nos apresenta a questões de fundo filosófico-existencial enquanto cria personagens complexos e tocantes.