Donn Fulton Eisele (June 23, 1930 – December 1, 1987) (Colonel USAF) was a United States Air Force officer, test pilot, and later a NASA astronaut.

After retiring from both NASA and the Air Force in 1972, he became the Peace Corps country director for Thailand, before moving into private business.

He received a Master of Science degree in Astronautics from the U.S. Air Force Institute of Technology (AFIT), Wright-Patterson AFB, Ohio, in 1960.

[10] Astronaut Office Chief Deke Slayton had warned the crew that they were all "expendable", and that any extramarital affairs must not become public.

Together with spacecraft commander Schirra and Lunar Module Pilot Cunningham, Eisele performed simulated transposition and docking maneuvers with the upper stage of their Saturn IB launch vehicle, and acted as navigator, taking star sightings and aligning the spacecraft's guidance and navigation platform.

Returning from Thailand two years later, he became Sales Manager for Marion Power Shovel, a division of Dresser Industries.

In 1981, Eisele was appointed to a vacant seat on the Wilton Manors City Commission, and served in that political office for roughly one year.

Eisele was cremated in Japan, and his ashes were buried in Arlington National Cemetery with full military honors.

[15][16][17] Eisele was an Eagle Scout, a member of Tau Beta Pi, and a Freemason, belonging to Luther B. Turner Lodge # 732 in Columbus, Ohio.

[24] In the final three episodes of the 2015 ABC television series The Astronaut Wives Club, Eisele was portrayed by Ryan Doom.

[25] Susan Eisele Black donated a sample of a Moon rock to Broward County Main Library on behalf of her late husband, on October 23, 2007.