Episode 13, season 5. At 14 minutes and 20 seconds in, it's in the third word.
Hope this helps.
( TonyUNDERSCORE from the Internet, Tue 23 Jun 2009, 23:14, archived)

Ah this brings back memories
of the lame copy-protection on Amiga games. Enter the first word on page 43 sentence 7.
(Northern Lovely, Tue 23 Jun 2009, 23:16, archived)