The Planet of Funeral in the Mist
As the 999 touched down on the Funeral Planet, its arrival (and whistle) disturbed a funeral procession, who decided to bury Maetel and Tetsuro alive as punishment, with the proper pomp and circumstance. They were rescued by Machiru, a woman responsible for ringing the funeral bell. She explained that the inhabitants on the planet were immortal, so killing for funerals became a past time when they witnessed one over 120 years ago, when a couple crash landed on the planet. The bell stopped ringing, and Machiru was killed by the procession as a result. Maetel and Tetsuro came across the procession and stunned them all. Maetel explained to Testuro that funerals would be given to them when they stopped moving, whether they were still alive or not.
Aired 21/02/1980EP 66 - The Planet of Funeral in the Mist

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)