but why are the episodes with lengths? are a thing so pointless!

but then you need to put in every season until the 6th an episode titled "1th birthday, anniversary 2th, 3th anniversary "........ ?

the only one I like is "Mork returns" but only because there was Mork!

apart from the fact that I love all the seasons, one of the advantages of the last seasons (from the 7th onwards ...) there are no more 'these unnecessary incidents, in part, we know why, in the 10th, how come back in that' opportunity?

BHO! Servan not understand that 'these anniversaries, understand one' episode with the lengths of seasons earlier, in '11th, where now "happy days" but had a past that serves them every year?

YES also the 9th begins with a un'episode lengths but the plot had no shots were other episodes.

I say the same for "American musical"