need help finding what episode this is

[randybruder]

in one of the episode, ross and chandler are sitting on the couch at central perk, and something very similar to this dialog takes place:

Chandler: "This is a curiet mireaux!"
Ross: "What is that?"
Chandler: "The unsolveable mystery they gave Spock."
Ross: "No, that was a ..."
Chandler: "Then what's a curiet mireaux?"
Ross: "The hotel we stayed at in Isreal"

This is killing me, I have searched for months and I have no idea what season or episode it is from (or if it even happened at all), so any advice would help.

thank you very much!

-randy