Complex sentence: A young zombie boy who is murdered at the beginning of the third season, and who is revealed to have been a former neighbor of Clive who became something of a surrogate son to him after he rescued Wally and his mother Anna from their abusive patriarch.
Split into simpler sentences: A young zombie boy who is murdered at the beginning of the third season, and who is revealed to have been a former neighbor of Clive. Wally became something of a surrogate son to him after he rescued Wally and his mother Anna from their abusive patriarch.