On the first two parts of Justus and Bob - the first part is my favorite - is nothing to complain about and they offer a lot of entertainment, excitement and new insights into the departments of the two detectives.
Peters part is something panned in the ways, as he is really shown to be very simple and especially stupid. The fact that Peter the gained fame - although it is a bit exaggerated with glory in my opinion, also a big fan would have enough - can handle not good and is overwhelmed in his naive beings fit while still best to him , But at least when meeting with his new acquaintance, the scene is a little too abstruse. The dialogue and the following events to the conversation with his mother look very strange.
Consequently, I find the presentation of his person and the handling of its counterparts rather failed, however, the approach of this story involves an exciting development but a certain level of discomfort with it and brings out my eyes for only one star deduction.
The allusions to other productions of Europe, I can not do much. They look a bit silly (5 Friends: George, Timmy - even the Bell-sample is the same as 20 years, etc.) and one should prefer to remain in the Three Investigators Universe.