I only give this set of 3 seasons, 4 stars, because season 3 has been very disappointing. There must have been some bad acid going around Hollywood in 1974, because the writers, directors & production team really sucked! Season 1 is the best. Season 2 was pretty good although it too had a few poor episodes. Season 3 is the reason there was no season 4. At this point, to be honest, I have only watched half of season 3, but I am in no hurry to watch the balance as almost every episode so far has been ridiculous.
Well I just finished watching the last episode. The second half of season 3 was better than the first half, in my opinion. However, on discs 3 & 4, the episodes Barbary House, Flight to Orion, The Brothers Caine and Full Circle, should have been the final episodes, but they are not. After Caine has found & re-united with his brother and extended family, there are 3 more episodes, one of which makes a reference to Caine's search for his brother, which is very strange. I now question the accuracy of the episode air dates. During one episode in season 3, during a flashback to his youth at the temple, Caine and his Master discuss Caine's blood brother, but Caine didn't even know he had a brother until he came to America. Very stupid script in that case. A special feature on disc 4 is really good - David Carradine makes a trip to China, with some friends, and visits a Shaolin temple.