 without admitting that he has a problem.The evidence would also suggest that only Erica is actually aware of Nebulous's difficult relationship with his parents; although Paula is aware of Nebulous's childhood in the circus after a time-travelling experience took them back to the Professor's childhood, and Harry mentioned that Nebulous's old reputation was based on the inspirational idea of him going from a clown to become a scientific genius, neither of them appear to be aware of the full details of what his life was like as he grew up.It was revealed that they had two other children, Spiffo and Mofo Nebulous, with the Nebulous we know being "Boffo", but Mofo was killed by Spiffo during a knife-throwing "trick" while they were children and Spiffo was later sentenced to an infinite life sentence in Biros Optimum Security Prison (How the parents reacted to this is unknown).