Drew Carey Show - John Jr. Is Rolling Over in His Grave
I don't recall the exact plot of this episode, but it involved Drew throwing a party with the impression that several supermodels were going to show up.
As he is setting up for the party, he displays something he bought especially for the occasion: a new toilet seat.
Drew's friend Oswald takes the seat to the bathroom to install it, but before he leaves, he says "Wow! Supermodels AND a new toilet seat! I feel like a K---" and the rest of his statement was bleeped out.
If you had watched his lips, you would have seen he had actually said "I feel like a Kennedy", but since this episode aired just a few days after JFK Jr's plane crashed, the comment was bleeped out.
The fact that it was bleeped out, not edited out, leads me to believe that no one realized the joke was in there until the episode aired on the East Coast, and that by the time it showed on the West Coast (where I am) the network bigwigs had been alerted and the offending line was removed.