Trying to find an episode for Numb3rs

[charleseppes.livejournal.com]

I hope that I can post this here, since everyone here is so helpful.  I'm looking for an episode, in Season Two (I am pretty sure) and the only thing that I remember from that episode is Larry breaking apart a pen and dumping the ink into the water and saying that the water is coming up, not going down.  There is a leak in Charlie's office.  Does anyone have any idea which episode this might be?  I'm in the mood to watch it and I can't seem to find it.....unless I go through all of Season Two (which wouldn't be a bad thing).

Thanks all!

{{{hugs to all}}}