S9·E8 Swept Away

Mitch befriends Tanner, an abused nine-year old boy who tries out for the junior lifeguards in order to get away from his ill-tempered, alcoholic, divorced father, Blake. But Mitch feels helpless in helping Tanner when everyone tells Mitch not to get involved in the boy's troubled home life and to mind his own business. Things turn chaotic when a bus falls off a bridge and lands in 20 feet of water.