Conspiracy Theory begins with an interesting premise: what if the paranoid delusional nutcase actually is right about something? It also boasts credible star power, with Mel Gibson, Julia Roberts and a coldly menacing Patrick Stewart leading the cast. However, the film offers nothing for audiences to grab on to, no foothold or solid plot thread. Its meandering pace hurts the "thriller" aspect greatly - a good number of the scenes seem twice as long as they actually need to be, for one. Mel Gibson appears to be enjoying himself, but his character is not much more than a rambling, incoherent and absurd mess. The whole mystery of what exactly happened to him doesn't matter much when it's not a character you really care about. Julia Roberts is fairly believeable as a US Attorney worker, and her calm and rational character is supposed to work as a counterpoint for Gibson's, but a lot of their chemistry seems forced and overly awkward. Patrick Stewart actually doesn't do much at all - those glasses and the scar on his nose do all the work for him. In addition, the film is tonally very odd and inconsistent - the main character of Jerry Fletcher seems to have stepped straight out of a comedy, but the film really wants to be a tense thriller, and in the end it isn't really either one. This film may have worked in theory, but in practise doesn't hold together.