Eddie Mekka and Ed Marinaro starred on Laverne & Shirley (1976) together.
It can be clearly seen--indeed blatantly conspicuous--that 12-year-old Nathan has had his hair dyed blonde over its natural brown colour. The question is, what boy of that age would do such a thing and why, or perhaps somehow had persuaded his mother to allow the change--something much more likely for a girl to consider. Furthermore, at no point in the film is the obviously dyed hair ever mentioned or explained.