Galaxy Express 999 S01 E20 Professional Spirit

The 999 travels to a planet full of professionals, and Maetel warns Tetsuro not to look anyone in the eye. When Tetsuro does so, he is captured by a professional hangman who tries to hang Tetsuro. Tetsuro is saved when another professional, a gunman arrives and shoots the hangman. This professional however insists on teaching Tetsuro to become a professional dueler.