S1·E9 Bad Peter

Tracy is excitedly waiting to be taken out for the day. However, when Tracy sees who's going to be taking her out – Terry and Jill Brown – she's horrified to see they are old. On the other hand, Peter likes the look of them. The day out doesn't go well, as Tracy is too lively for Terry and Jill to cope with. But a vengeful Tracy persuades Peter to become bad so that the Browns will not foster him, bringing chaos to the DG and completely shattering her friendship with Peter.