Breaking news: the Brady Bunch jumped the shark in its first episode!
Cousin Oliver was played by actor Robbie Rist. At that time, his idol was John Denver, why he wore his hair in that style, had glasses with the same frames as Denver.
Being that he had gone so far as a fan, I found it odd that when Denver died in his plane accident, in all the tributes I saw, the reminiscing from old friends, re-running "Oh God" and all, no one went and looked up Robbie to ask him about his memories, talk about the time he actually met John and all. Just thought I'd add, since you brought him up ...