Sam faces her hardest challenge yet: avoiding alcohol on St. Patrick's Day in Boston. Brit gives Sam an unexpected chance to rekindle their friendship. James and Mindy track down his lost keys while battling St. Patrick's Day temptations.

Sam scores a victory when she lands a job interview in New York with an unlikely ally, only to discover how scary it is to write while sober. Concerned her daughter needs help, Carol breaks a boundary and introduces herself to Olivia.