Samurai Jack is characteristically quiet and minimalist, to the point where Phil LaMarr, the voice actor for Jack, isn't even in all of them:
There are some episodes that he is in that I'm not in, just because, he didn't speak. I was looking at that on IMDb that the number of episodes produced, and the number I'm credited in, are not the same.
— Phil LaMarr on I Think You're Interesting, Episode 7, 2:25
Which episodes are those?