The fourth season of the original Mission: Impossible originally aired Sundays at 10:00–11:00 pm (EST) on CBS from September 28, 1969 to March 29, 1970.

The fourth season of the original Mission: Impossible originally aired Sundays at 10:00–11:00 pm (EST) on CBS from September 28, 1969 to March 29, 1970.
The fourth season of the original Mission: Impossible originally aired Sundays at 10:00–11:00 pm (EST) on CBS from September 28, 1969 to March 29, 1970.