Pop culture says Gene Cernan carved his daughter’s initials into a rock in the Taurus-Littrow valley. According to the biographical sources in this episode, that is a myth. What he actually did was simpler and more poetic: before climbing the ladder for the last time, he traced the letters TDC into the lunar dust with his finger. This deep dive examines the life of the last human to walk on the Moon as a study in pressure, career gambles, and operating at the limits of capability.

We follow Cernan from Chicago and Purdue to more than 200 carrier landings and two engineering degrees, then to Gemini 9A, where he became prime crew after the deaths of Elliot See and Charles Bassett and endured a near-fatal spacewalk without restraints. We revisit Apollo 10, the dress rehearsal that skimmed within 8.5 nautical miles of the surface and set a crewed speed record on reentry, the decision to turn down Apollo 16 to command Apollo 17, and the ultimatum that replaced pilot Joe Engle with geologist Harrison Schmitt. Finally, we look at the record-setting final mission and Cernan’s later reversal on commercial spaceflight.

• Why NASA wanted a hybrid of elite pilot and academic engineer in Group 3
• The angry alligator target vehicle and the fogged visor that ended the Gemini spacewalk
• Mascons and why Apollo 10 had to map lunar gravity before Apollo 11 could land
• Three days, 22 hours of spacewalks, 110.4 kilograms of samples, and an unofficial rover speed record
• His 2010 testimony against cancelling Constellation and the briefing that changed his view of SpaceX