Tireseus (Castle Walls)
There was a mini-series on Scifi for Hercules. Tireseus played a large role...I thought about the song when she (or he, depending on what in and out bits you are looking at) was first shown.
In the Odessey mini-series from some years ago, he (or she) also showed up and was played by Christopher Lee...Odesseus had to cross the river Styx to chat with him.
Also, Hercules had to visit the river Styx to fight Cerberos, the three headed dog that gaurds the gates to Hell.
I knew Tireseus was part of the story for the Odessey, but did not know about Hercules...unless the scifi writers just made it up instead of following the orignal tale.