If you're like me, you thought the series was pretty cool but didn't wanna buy the whole set. I found the Blue Planet part3 NEW on Ebay for like $9, I was hesitant to order thinking it might be a copy or something, but its the real thing. I just tried to find the one where I got it, but its sold out now. There are more that are cheaper then what I payed. Part 3 is the "Seasonal Seas and Coral Seas".