Buck Rogers in the 25th Century S02 E09 The Satyr

"The original space man! The ultimate trip! Buck Rogers swings back to earth and lays it on the 25th Century!"

Buck and Twiki come across the survivors of a failed colony, a young widow and her son. The woman tells Buck that the other colonists all fled the planet as the result of a plague. Buck is confused by the woman's refusal to leave the planet despite being repeatedly being menaced by a goat-man named Pangor; but he soon discovers the truth about the plague when he contracts it and begins to turn into a goat-man himself.