The mysteries began with the first poster for the upcoming mind-grater, Tinker, Tailor, Solider, Spy, which depicted a code-laden Gary Oldman. Now, Oldman's costars Colin Firth and Tom Hardy (the latter of whom will also be starring with Oldman in The Dark Knight Rises) have received the same treatment.
So what can we deduce from these graphics? What messages lay within? "Circus," "Scalphunter," "Merlin," "Karla," "Mole." That's what was discovered from a painful fixing of eyes into the coding about an inch away from the screen. That and a serious headache. But it was worth it! For now... we know. ... Something.
Source: Empire Online