Airwolf’s opening I’ve seen before; and the Dallas one is pretty great. Here are a couple I’ll throw in to the mix:
Rupert note the interesting time signatures
Gormenghast the first and second books are excellent. The third is… different…
The Prisoner possibly the greatest (and surely the longest!) opening
A propos of nothing, I think this is one of the funniest images ever made. The pure horror of the small child, the utter confident terror of the elder, the random shingles, the unexpected wooden bucket, the crazy cute rabbit staring at the unexpected wooden bucket - just pure genius