I guess he's gonna do lampreys as the "vampire" and Wels again (from the vid).
But I hope he goes back for that fish he wasn't able to catch (forgot which ep.).
Maybe a Wallago Leeri???
I don't understand why he hasn't done a pike/muskie episode yet. Muskie grow as large as taimen with 3 times the mouth size!
Also he could build it up starting in Europe with northern pike and then flying to NA to get some larger muskie.