Here's another lost weekend - S4.E7

Molly visits Nina and her baby, Ruby, at their new home in the country, but the weekend doesn't turn out to be quite as idyllic as she had expected. Instead of heart-to-heart talks and hikes in the woods, Molly winds up babysitting for Ruby on a stormy night while a preoccupied Nina goes out on a date. When the power fails and the basement begins to flood and the baby to cry, Molly doesn't know where to turn for help. A phone call to the city brings Davey to the rescue.