Re: "The Trouble With Tribbles" is the most overrated episode of TOS..
. . . This episode tries too hard to be cute and it is BAD.
Funny, that's how I feel about "A Piece of the Action." Not bad in the sense of unwatchable, but just too contrived and cutesy. It's my least favorite of the three Trek TOS episodes that were out-and-out comedy. (Four if you count "Spock's Brain.")
“All the universe or nothingness. Which shall it be, Passworthy? Which shall it be?”