The episodes are all free to watch!
Unfortunately, because of the way the players work, you will get a pop-up ad when you first click “play.” However, all you need to do is close the ad, then click the play button again, and it should function properly.
Basically, when the play button is red, clicking it will launch the ad. Then the play button will turn green (in the original window), and clicking it will play the episode.
Let us know if you’ve tried that and you’re still having trouble!