All 4 seasons of Thundercats is available on Amazon Prime Instant Video
Did you know that you can watch all of Thundercats on Amazon Prime Instant Video (Amazon needs to shorten that name)? Yes, it's true! All 4 seasons of the critically acclaimed children's programming is available for "free" viewing as long as you're a Prime member (at this point, if you aren't, you're missing out on one of the web's best all-around deals).