It could be a coincidence, unless the He-Man composer was a royal douche.
The two having the same meter structure but different melody reminds me of the fact that most Emily Dickinson poems can be sung to the tune of "The Yellow Rose of Texas."
The REMINGTON STEELE video doesn't work ("not available"), but without having heard a note of that one, I'm doubting there's much more than a coincidental similarity -- more in style than melody.
With only 12 notes in our normal music scheme, some melodies will be always similar to other ones. But I am unable to confuse "Remington Steele" with "He-Man"
Jeff, nice job on the Youtube find and especially the notation. Still, I'm with Captain Kaos - there may be some similarities but they're cousins not siblings.
I'm sorry, but that just proves it -- one composer completely ripped off the melody of the other.
He may have done it subconsciously/unconsciously, but that's practically the same tune. A few cosmetic differences doesn't hide the fact that it's the same melody.
I'm legit surprised that no one ever got sued for this. If I had to guess, I'd say that the He-Man composer ripped off Mancini (who did Reminigton Steele), but I don't know for sure when one or the other theme first aired.
Again, it may well have been done unintentionally (the one who ripped off the other probably heard the other melody, then, during composing, it came to him -- and he thought that it was inspiration, not a subconscious memory).