In the third season we finally see Big Jo and Porky again, but where have they been the hole five months? Why he can survive an vulcan? And why he isn't dead? (And at the end of episode 10 season 1 you can see Luci, goes around the corner furiously and all you can hear is the sound of a demon being sucked into a bottle, while Luci said: "You?")
First of all: Big Jo has a metal arm-protese who actually works, I think he got it from Steamland, but how?
Second: Maybe (or defintfly) Big Jo ist immortal but then, why he kidnappt Elfo. I think he is immortal since a long time even before King Trøg and he wants to be mortal again, Malfus said: "immortality is a curse" and I think he was right. And maybe Big Joe is fed up with being immortal, I know this theory is far fetched but what do you say?