Uncle Bill leaves Cissy in charge of babysitting the twins, but neglects her duties when Gregg takes her on a plane trip to Dartmouth. Cissy calls for a sitter for the twins and leaves but when the sitter cannot make it, the twins have to stay ll by their lonesome. Especially on the night of a blizzard, which would be totally scary if the phone lines are down and nobody can reach them. Cissy then comes home around dawn. Uncle Bill returns home and Buffy fesses up. (thetvdb.com)