Overview:A group of prank-happy teenagers find their latest joke is no laughing matter. Meanwhile, the Fishers decide to hold a yard sale; David grooms Arthur for a new role; Nate gets intimately involved in Maya's afternoon playgroup; Claire attends an art party; Ruth and George receive some unwanted wedding gifts; Federico gets caught up in family responsibilities; Keith adjusts to the peculiarities of his new job; Joe isn't thrilled by Brenda's yearning for normalcy; and some important memories go up in smoke.