It looks like a lot of fun. I don't about Daryl Hannah, but that was Lucy Liu, wasn't it?
Carradine is just getting, well, old, and he's had his ups and downs with his health and well-being. While he was in Toronto shooting Kung Fu: The Legend Continues, he was seriously into the booze. One day he got hold of a bottle of rum and climbed to the top of a building and sat with his feet dangling over the edge. It took the crew half a day to coax him down.... (my friend's girlfriend was one of the camera crew in the first couple of seasons of the series, when this event occurred).
Towards the end of the series, he did finally get off the sauce and started pulling himself together, and then Warner Bros. pulled the plug on the series, which was too bad, because the storyline at the end of the last season had just taken an interesting twist.