This scene lacked credibility

Okay, I watched this episode of The Hardy Boys/Nancy Drew Mysteries on DVD. It's the episode where Janet Louise Johnson was introduced as Pamela Sue Martin's replacement as Nancy Drew. You can see some vidcaps here.

In this silly scene, Nancy accosts the Hardy boys, confronting them in disguise. She was wearing some sort of mask (which, unfortunately, is not shown in the aforementioned vidcaps). This mask covered the upper part of her face, but left the lower part quite visible.

Why is this silly? Because Ms. Johnson (now Janet Julian) has this great big mark on her left cheek, near her mouth. It's not unattractive by any means, but it is distinctive. The boys should have immediately recognized her based on this mark alone.