Laala from the Double Planet
The 999 arrives at the Dual Planets, a world full of machine people. When a large group of machine people at a restaurant treat Tetsuro and Maetel rudely, Tetsuro goes on a rampage and kills them all. Tetsuro and Maetel then meet Lala, a machine woman who steals Tetsuro's body, switching it with her own.
Aired 14/12/1978EP 14 - Laala from the Double Planet

Galaxy Express 999
After witnessing the death of his mother and being left for dead at the hands of Count Mecha, ten-year old Tetsuro Hoshino is awakened by a mysterious woman, Maetal. In exchange for only his company, Maetal offers him the ride of his life on the Galaxy Express 999. It is said that those who travel aboard the legendary train to the end of the line can receive a free mechanical body and with it, immortality.
Impoverished and alone, Tetsuro leaps at the opportunity and joins Maetal on a quest that will span the cosmos. As the Galaxy Express 999 makes its way across our solar system and beyond, Tetsuro is drawn deeper into a dangerous universe where peril lurks at every stop.
(Source: Discotek)