September 17, 1966 Pilot for Mission: Impossible airs. Team leader is Dan Briggs, played by Steven Hill.
September 10, 1967 Second series begins. Briggs replaced by Jim Phelps (Peter Graves).
	September 28, 1969 Fourth series begins. Barbara Bain and Martin Landau both leave. Leonard Nimoy joins.
March 30, 1973 The final episode of the show is broadcast. Mission: Impossible ran for seven seasons (171 episodes).
October 23. 1988 Peter Graves returns in a new series. Despite mixed reviews it runs for two seasons.