Joan heeds God's advice to stop squandering her potential by enrolling in an advanced-placement chemistry class. There, she's partnered with two of the school's biggest underachievers. Elsewhere, Will is frustrated when a murder trail goes cold due to an arson investigator's overly-thorough examination of the crime scene; and Helen is eager for Kevin to get a car after he passes his driver's ed test.

Helen questions her daughter's sanity when, like Noah, Joan builds a boat; and Will faces second-guessing from his rank and file for refusing to connect the murder of one cop to the slaying of another within the same week. Meanwhile, Kevin struggles with feelings of bitterness when he's encouraged to join a wheelchair-basketball team.