Watch Full Movie Online. Adam and Charlie Flint are two young, hip, film-maker brothers who decide to make a docudrama web-series about a real-life private investigations company, but the only company that will agree to be the victims of their constant amateur following and bad "in your face" shooting style is "The Investigation Mill", a struggling business of misfit, degenerate, somewhat professional private investigators. 'The P.I. Experiment' is a hilarious dark comedy with witty endearing characters that captivate your attention like a bad car crash.