He threw horrible tantrums, and his father called him a psychopath.
During arts and crafts, Peter tried to use more glue on a used sock, but Adele told him that the glue was enough, and found out that he threw a violent tantrum. Deanna showed Adele her finished sock puppet, and Peter hit Adele in the nose and headbutted her. Nanny Jo Frost arrived and sent Peter to Time-Out for four minutes. Four minutes later, Jo reminded Peter to apologize to Adele for headbutting her. Peter apologized to Adele and hugged her.
He was 4 years old on Supernanny and is 13 years old as of 2017.