Ever since Deep Throat was first introduced in The X-Files, he quickly became one of the most important characters in the sci-fi TV series. Dana Scully (Gillian Anderson) and Fox Mulder (David Duchovny) interact with many mysterious and dangerous people while doing their jobs, including The Cigarette Smoking Man (William B. Davis). Like the black oil in The X-Files, Deep Throat is unnerving and impossible to ignore.