As unrealistic as this show was, Peter having a twin or a doppelgänger or a lookalike was just stupid. Nobody in the school noticed? After "Arthur" fooled the family, Peter was clueless regarding checkers, the pies and Jan's homework. (Arthur lusting for Jan was a creepy vibe.) This, more than bringing in Oliver, made the highest jump over the shark.
Review of Two Petes in a Pod
