In the opening scene, Tony and Roger have just returned from the Moon. On July 20, 1969, two months after this episode aired, Neil Armstrong and Buzz Aldrin became the first men to set foot on the Moon's surface. This was the last episode to air before the actual Moon landing.
The woman who pretends to be Tony's wife is named Sue Ellen. Larry Hagman later played J.R. Ewing, the husband of Sue Ellen Ewing (Linda Gray), in Dallas (1978).
At the beginning of the episode it was stated the astronauts were from Apollo 15. In the episode Around the World in 80 Blinks (1969) it was stated the flight they were on was Apollo 14.
The title is based upon the expression "Mail Order Bride".