The mission control voice is provided by Dick Tufeld, who also voiced the Robot in Lost in Space (1965), another Irwin Allen production. He also serves as the narrator on this program, so he essentially plays two roles in this episode.
This episode takes place aboard the Mars Excursion Module in 1978 and in Arizona in 1968.
The uniform patches worn by the MEM crew are the same patches worn by the "Spindrift" crew in Land of the Giants (1968), another Irwin Allen production. They were also used as insignia for the uniforms worn by members of "Galaxy" organization, in the film Our Man Flint (1966).
Some of the footage used in the Time Tunnel complex is from Forbidden Planet (1956), which film co-starred Warren Stevens, who played Dr. Harlow in this story.