Dirty Business

S1 E17: A pornographic film company films the indiscretions of people it wants to invest as "Dirty Business" on "Charlie's Angels". A legitimate business is targeted for arson and Charlie's Angels are called in to investigate. Soon, they discover that the corporation is actually a front for a pornographic film studio - and that the studio films the after-hour activities of wealthy people and then blackmails them into investing. As the scheme becomes apparent, the Angels dis-cover the ring's kingpin - caught accidentally in one of his own porno films…"Sally in Sin City."