Lloyd's plans with Abacus are ruined when he has to go on a family trip to Caterpillar World, but PB can't wait - she's finally going to find out the gory details of what happens inside a chrysalis! However, the show is not what either of them was expecting...

Lloyd, PB and Abacus discover a fly frozen in an ice cube - a drop from the kitchen counter later allows them to meet Marvin, a fly from the past. Full of gratitude, Marvin insists on repaying Lloyd, but his persistent helpfulness soon gets out of hand.