The fourth season of the original Mission: Impossible originally aired Sundays at 10:00-11:00 pm on CBS from September 28, 1969 to March 29, 1970.
4 - 1The Code Sep. 28, 1969
4 - 2The Numbers Game (aka: The Key) Oct. 05, 1969
4 - 3The Controllers (1) Oct. 12, 1969
4 - 4The Controllers (2) Oct. 19, 1969
4 - 5Fool's Gold Oct. 26, 1969
4 - 6Commandante Nov. 02, 1969
4 - 7Submarine Nov. 16, 1969
4 - 8Mastermind Nov. 23, 1969
4 - 9Robot Nov. 30, 1969
4 - 10The Double Circle Dec. 07, 1969
4 - 11The Brothers Dec. 14, 1969
4 - 12Time Bomb Dec. 21, 1969
4 - 13The Amnesiac Dec. 28, 1969
4 - 14The Falcon (1) Jan. 04, 1970
4 - 15The Falcon (2) Jan. 11, 1970
4 - 16The Falcon (3) Jan. 18, 1970
4 - 17Chico Jan. 25, 1970
4 - 18Gitano (aka Toys) Feb. 01, 1970
4 - 19Phantoms Feb. 08, 1970
4 - 20Terror Feb. 15, 1970
4 - 21Lover's Knot Feb. 22, 1970
4 - 22Orpheus Mar. 01, 1970
4 - 23The Crane Mar. 08, 1970
4 - 24Death Squad Mar. 15, 1970
4 - 25The Choice Mar. 22, 1970
4 - 26The Martyr Mar. 29, 1970