Which special guest was involved in an historic event?

Since no one is willing to guess, I will put forth another clue; it has to do with JFKs trip through downtown Dallas.

Almost three months later and no one wants to take a stab at the answer?

I'm disappointed that not even one person cared to give a guess who the guest was.
Now that the anniversary day is approaching, I will reveal next week what the answer to the trivia question is.

Bobby Hargis, who escorted the Presidential limousine, had a speaking role in one of the episodes that were filmed in Dallas. He appeared in "Kiss The Maiden All Forlorn". This episode was filmed over a year before Kennedy's trip to Dallas.

A side note to that, some cast and crew visited the Carousel Club during their stay in Dallas. The Carousel Club was owned by Jack Ruby, Oswald's killer.

Interesting fact; One of the character's name is Mother Teresa.