They are actually UNDER the shower room, but to get there, you have to go through another place.

Go back into the castle and head for the dining area. Near there will be a security door that requires level 1 (green) security access. Go through and you'll find the scientists.

If you need the green keycard, find stairs that lead upwards. Get to the very top of the castle and you'll see a control room filled with computers. The keycard should be there.

[ March 05, 2002: Message edited by: just_ignore_me ]