Mr. Clark[]
Mr. Clark is the father of Andrew Clark, and the husband of Mrs. Clark. As a high school teenager, he did a lot of wild and crazy things, and he was disappointed in Andrew for not being like him. He also hated weakness and losers, and pressured Andrew to always be Number One.
After arriving at detention, he reminds Andrew that he "screwed around," and there's nothing wrong with that, except he got caught. Andrew reminds him that his mother reamed him. Later, when his father picks him up, he sees Allison, and he's surprised that Andrew got himself a girlfriend during detention.