S4·E6 The Substitute

In another rather light-hearted episode, the school teacher leaves to get married in a fit of what is deemed 'spring fever'. A search for a substitute teacher until the new one can arrive turns up a man who is very educated, but is now a drunk. Lily volunteers over Dan's objections - he's worried about what the women in town will do to her. His suspicions are proved right, but Lily once again wins over hearts by her kindness.