When Jo began teaching, Sean wouldn't come to listen to her, so he went to the Naughty Circle right away. He screamed nonstop, refused multiple times to apologize, and even hit Jo at some points. Due to this, his timeout lasted for about 70 minutes. At one point, he offered that he would only say he was sorry if he got to have a snack first, which naturally did not work.
He was also known for fighting with Dylan frequently.
He was 4 years old when he was on Supernanny and is now 11 in 2017.