Occam said:
Some of us are old enough to remember him before his wonderful reinvention as a comedic actor. Fess Parker as Daniel Boone was cool, but Leslie Nielson as Francis Marion, aka 'The Swamp Fox' was ultra cool.
I remember that show!
And he won me over with Forbidden Planet. I watched that three times in the theater.

I've got your power meters, Mr. Pass!

I think it is why I always had a soft spot for the word, "Krell". I need bigger amps, MORE POWER!
I did not know that he was nearly deaf, and wore hearing aids most of his life.
I also wonder if they will release a video of his travelling stage performance of the lawyer, Clarence Darrow.
He performed serious roles on screen and stage (such as his one-man theatre show Darrow, playing Clarence Darrow