"Doug's Disappearing Dog" is the twenty-fourth episode of Doug.
Doug wakes up the morning after the Flounder's Day Picnic to find that Porkchop has packed up his things and is gone. When Porkchop disappears, Doug has to try to find him. He concludes that someone must have done something bad to him to make him pack up and leave. So he goes to talk all his friends to question them about what happened to Porkchop the day before, only to find that each of them remember things differently.