I think he was wandering the Eath in search of the one-armed man who really killed the prince.
Brian
“Mister Kim-Chee, don’t make me angry…”
Per your link, it’s a trope.
Caine walked into a doctor’s office with a prince on his head. “Can I help you?” asks the doctor. The prince says, “Yeah, get this guy off my ass.”
Hey, it was there.
Just be thankful it didn’t last another season or they would have introduced his homeless cousin Oliver to wander along with him.
The show would inevitably have become The Kung-Fu Scrappy-Doo Hour.
…or eventually he would have met his and the skipper’s evil doppelganger in the desert somewhere, find a cursed tiki idol, get locked up in a Ghost Town Hoosegow by Zachariah T. Brown, fall into an abandoned Goldmine and meddle in Hank the caretaker’s business, and have a final Grand Finale showdown with Buddy Hinton, only to be saved at the last minute by the Harlem Globetrotters.
To be found dead in a Thai hotel closet from auto erotic asphyxiation?
That would still be better than the self-aggrandizing “Dinner with David Carradine” extra in the series DVDs.
But one drawn by an artist formerly known as… 
Let’s not forget that he was “marked” by his ritual burn scars.
Stop arguing! It’s like a damn mutiny in here!