The Incident

S6 E11: Caroline blames herself for a teen's death in a fiery nighttime boating accident in which five drunken, underage teenage boys accidentally set fire to their boat and one of them drowns. Caroline then fails a lifeguard re-check, pushes away Mitch, Cody, and even Stephanie who offer her comfort, and falls under the influence of bad girl Neely in drinking and hanging out with her biker friends.