Anyone remember this episode of The Dark Side

[neognosis]

an old man with his daughter travel with a Native American to the fountain of youth. the Native American tells the old man that in order for the fountain to restore his youth, the fountain needs young blood spilt. So the man kills his daughter, and his daughters blood enters the pool. The man then washes himself of this water, and he becomes young again. The man than gave a scientific explanation for the age-reversal. He then feels pains and becomes paralyzed. Native American says the white man lost all religion so that is why it is happening.

i only saw it once. but it struck. Not sure if it was The Dark Side or something else