I have to say that in my opinion this three-part opener to Series Four was the worst of the entire series. There was barely a trace of humor, some terrible special effects and a really weak script. No doubt others will disagree with me but I just didn't like it.
Pinky Tuscadero (Roz Kelly) is an old friend and an old flame of Fonzie's. She is in town to perform some pretty dangerous stunts on her motorcycle and to comepete in a demolition derby. She is obviously good at what she does because there is a lot of excitement among the locals as she prepares to perform, there just wasn't any excitement in the episode itself. The two Mallachi brothers, Count and Rocco, who injure Pinky do provide some very light relief though.