Synopsis by Hal Erickson
Imprisoned mobster Gunther Schell (H.M. Wynant) is the only person who knows where a stolen cache of money is located. Before the IMF can reach Schell, he is sprung from jail by a mob-controlled "underground railroad", which specializes in robbing its clients before smuggling them out of the country. To put both Schell and the "underground" out of business --- and, incidentally, to recover the stolen millions --- Jim Phelps poses as a wanted murderer. Peter Mark Richman also appears in this episode as criminal mastermind Hargreaves. Originally aired on October 28, 1972, "Underground" was written by Leigh Vance.